Food Sharing Apps

Food-sharing Apps are a platform which take overproduced or unwanted food which would be generally discarded and distribute it to people who actually need it. 1/3rd of all the food produced every year gets wasted. On the other hand, it is estimated that 10% of people die of hunger in the world and another 10% are malnourished. These food-sharing apps can increase food security and make sure everyone has access to minimum nutrition.

There are many such apps in the world. A few examples are:

  1. Seva Kitchen – It was launched in 2018 by Khushroo Poacha in India. It connect donors to the needy and the receiver can pick the food from the donor’s house. Anyone like caterers, restaurants, bakeries, etc. can be donors. Interestingly, there are more donors than receivers, so Seva Kitchen is trying to still not waste food. People use it to donate food during birthdays and anniversaries. They currently work with 13 hospitals and 7 schools.
  2. Zomato Feeding India – In 2019, Zomato and Feeding India (registered as Hunger Heroes) collaborated to eradicate hunger and malnutrition in India. They provide essential food support to underserved communities in the form of raw grains and freshly cooked food. They have served 4.3 Crore meals already and each meals costs Rs 15 to prepare. It is only applicable in India so far and anyone can donate money. It costs Rs 750 for 50 meals.
  3. Too Good To Go – It connects individual customers to restaurants and stores with surplus food. It was created in 2015 in Denmark. The purpose is to reduce food wastage worldwide and to give food to the needy at 1/3 the price. Till 2022, more than 57.7 million users and 154,000 establishments had signed up, and Too Good To Go has collected 139 million meals!
  4. ResQ – ResQ takes food that would usually be wasted, from quality restaurants, bakeries and cafes. People can find food of their choice and purchase it. It operates in European countries – Finland, Germany, Sweden and Poland, saving more than 110,000 portions of food every month.

I would like to be a sustainability advocate for Zero Hunger. For this, I have already shared a Seva Kitchen poster in my community, I have donated Rs 750 towards 50 meals through the Feeding India program and have already registered as a “Poshan Champion”. I have Taken a pledge towards promoting a Hunger Free India. I have created artwork to promote awareness about malnutrition and increase awareness about it. Lastly, I have urged others to get more educated about SDG-2. Food-sharing apps are important to reduce hunger and donating is a nice way to show that you care for the planet. Zero-hunger is UN’s SDG-2 which we have to achieve by 2030. So, save some illnesses and lives by donating some food!

WRO Competition

In September 2022, my friend, Avni, and I participated in a Robotics Competition, called World Robotics Olympiad (WRO). WRO is a global robotics challenge for young people, which uses Lego Mindstorms / EV3 (lego kit with hardware and software). We made a robot that could perform various tasks required by the competition.

First there were North and East zone Regionals. There were 100+ participants and only 8 teams were going to qualify for the Nationals. The theme of this year was “My Robot, My Friend”. For our category (8-11 year olds), the challenge was to design a garden robot that would:

1. Cut high grass: Green, tall element made with lego and in 2 parts
2. Collect bad weeds: Red element joined together with lego
3. Activate service point: See-saw type of lever that needed to be flicked, to indicate completion of tasks
4. Park itself back where it originally started
5. Not destroy (or even touch) the fences

All these elements were kept at random positions on a mat that was like a garden with dark green and light green areas. We practiced a lot and built a robot that could do all the tasks except collecting the bad weeds. The regionals were on Sep 10-11 in Shiv Nadar School, Gurgaon. Day 1 was to practice and day 2 was the actual challenge.

On the first day, we practiced at the location with the real mat and elements and were getting scores like 89, 71, 83, etc. (out of 125). We were feeling confident and very happy with how it was shaping up. The next day was the real competition. We were required to break our robot and rebuild it at the location (from our memory). Our design was very sleek and minimalistic – so we were done building it in 15 minutes.

Now it was time for our first practice round. To our surprise, the robot didnt budge! We realized that the code was not downloaded into the robot, as it ought to be. We fixed it and then the robot just made a sound of the wheels trying to move however it still did not move. We were stunned but were trying not to panic. Avni double-checked the code, while I examined the assembly. We had already spent 10 minutes earlier, to figure out how to put the balancing wheels. Finally I realized that our castor wheels needed to be put the other way around. Phew! Now it was working as expected. Then the actual competition started and it was going to be Best of 3 rounds.

In the first round, we got a score of 18 out of 125. We were very disappointed and were unsure what went wrong. We brainstormed and concluded that the placement of our robot changed because we had to activate it from the hardware (which we had never accounted for, but should have!). We were careful in the second round and were able to score 69 points (which was eventually our best score). The final results were announced and we were overjoyed because we were amongst the 8 teams from North and East zone who had qualified for the Nationals. Yippeeee!

We had loads of fun and also made some friends. There was a participant called Sharanya who looked a lot like Hermione (from Harry Potter), so we called her fake Hermione. We also played in their basketball court between the rounds. We also stood on chairs to cheer for all the other teams because everyone had worked so hard on their robots and we could see that everyone was trying their best.

The nationals were on Sep 30 – Oct 1 in Noida. This was a 1.5 hour drive from Gurgaon and they were going to announce a surprise rule to make the competition harder. There were teams coming in from all over India. It was in Global Genesis school in a huge hall. When we arrived, we saw at least 500 people at the event, including coaches, parents and participants.

We had used the 3 weeks to prepare our robot to compete in the nationals. We added 2 more color sensors to make our robot smarter. Also, we changed the design to make it horizontal instead of vertical so that the positioning does not get disturbed when we activate the robot. On the d-day, we had to break every component we had used. This was tricky and we forgot our design. First we panicked and almost gave up. Then I reminded Avni about something that I had read elsewhere: “If you have components, you have a chance”. We were both inspired and started creating a new robot design based on whatever we had learnt in the last 3 months of practicing at home. Finally, Avni tested the code a lot. I was in charge of positioning and even if it went a millimetre to one side, our score would decrease by at least 10 points. Whenever we started, I had butterflies in my stomach. Eventually, we ended up with the BRONZE BADGE and were among the top 25 teams all across India. We were thrilled at this awesome news. Our parents and also other strangers congratulated us! It was an experience I will always remember very fondly.

Avni said, “In this competition, the thing I enjoyed most was, interacting with my friend and coach. The parts I felt challenged on were the announcement of surprise rules and the robot building. We had to carry an open mindset and the problem solving had a lot of challenges. What I realized was how all this we learn in school about problem-solving, open mindsets and collaboration plays a huge role in our life experiences. I also learned more about robotics. We will be competing next year and the goal is to come at the top and represent India at the International level”.


2047 will be a milestone year for India because it will complete 100 years of Independence. India has made tremendous progress in the last 75 years and we have much to celebrate. But my dream for India is for it to be an ideal nation that everyone looks up to. My vision for India in 2047 is a well-managed, literate and modern country that contributes to the SDG goals (Sustainable Development Goals by UN). I hope that there is mandatory education for all children. Aligning with SDG-4, I would like to see quality education and lifelong learning opportunities for all.

Further to this, I would like a hunger-free homeland, where there is enough food for all. We help achieve SDG-2 by ending hunger and improving nutrition. This food could be bought with money or grown sustainably. Food should not be wasted. Farmers drive the agricultural economy, and they should be trained on using fertilizers and on knowledge of crops. This way we can ensure sustainable consumption and production patterns form SDG-12. Also, if we provide employment for all, people will have enough money to feed themselves. I imagine an India where there would be no poverty (SDG-1). Also, with SDG-8, India can provide productive employment and decent work for all its citizens.

In addition to the above, I also look forward to a pollution-free India for the sake of people, plants and animals. The environment would be clean, air will have low AQI (below 50), water will be free of dirt (SDG-6) and available for everyone.

Moving along, I hope that there is no discrimination based on religion or gender! India would have achieved gender equality (SDG-5), and reduced other types of inequalities (SDG-10). There should be no segregation based on race or religion and women are empowered and have equal rights.

I also envision everyone to have access to medical treatment and health facilities (SDG-3). People should be knowledgeable about their health and fitness and cost of hospitals should be affordable for everyone. We should promote well-being for all at all ages. India should also be able to make progress in science and technology.

Lastly, I would like to see the use of renewable energy for more sustainable cities. This correlates to SDG-7 and SDG-11. The next 25 years will be crucial not just for our country, but also for us citizens. I envision observing a strong and remarkable nation I couldn’t be more proud of!

Har Ghar Tiranga

See my previous Independence Day post here.

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I am enjoying doing a lot of Science Projects these days. I made a long, colorful DNA model. This is how to make it. Collect these things first!

  1. White paper
  2. Ruler
  3. 4 colored highlighter pens
  4. Tape (If you have colored tape, it’s best)
  5. Pencil
  6. Scissors

Put the ruler on the white paper.

Make about 30 strips which should be 1 cm (1/2 in) wide and 3 cm (1+1/4 in) long with the pencil. Cut out the strips with the scissors. Take each strip and pinch a crease halfway across the total length.

Now color the paper rungs on both sides. One half should be one color and the other half another. The colors should always be in pairs – for example orange always goes with green.

Now cut two strips of tape about 70 cm (28 in) long. Lay the strips face up next to each other with a gap of 2 cm (3/4 in) between them. Stick down the ends with small pieces of the same tape. Press the colored rungs onto the two lengths of tape.

Everyone’s DNA is different, so there is no right or wrong combination. When you’ve stuck all the rungs, carefully fold both lengths of sticky tape over them to hold them in place. Tear out the side tapes you put to hold the two sides of DNA out of the tape on the sides. If you are not able to, tear it from the ground. Then cut out the sides. Your DNA model is ready!

About DNA

I found DNA very interesting so I researched more about it. The full form of DNA is Deoxyribonucleic Acid. This is how to pronounce it: Dee-Oxy-Ray-Boh-Nyoo-Klee-Ik Acid.

This twisting multi-colored ladder is a model of a very important part of your body. But it’s about 10 million times bigger than the real thing.

DNA is a tiny molecule. It is the code in our body for how we look, how tall we are and many more. DNA is connected, so if your great-grandfather and great-grandmother are long then you are likely to be long. Here are some other interesting facts about DNA:

  1. There are 3 types of DNA: A-DNA, B-DNA, Z-DNA.
  2. DNA is curled.
  3. DNA is in pairs – for example yellow always goes with green.
  4. DNA is not in a specific order ; everyone’s order of DNA is different.
  5. DNA is in everyone’s body (all living creatures). It is the Blueprint of the body’s protein.

How it works

Flow Chart

Did you know?

• We have more than a trillion DNAs. That’s as much as the Earth to the Sun ~600 times!

• Genes are only 3% of the DNA. Rest of the DNA controls the activity of the genes!

• Human DNA has 3 Billion pairs of bases of DNA.

I hope you found all these facts interesting. If you make a DNA model at home, do post a picture in the comments.

1. Google, YouTube videos
2. Craft Activity from Home Lab book by Robert Winston

Icy Orbs : Science

I did a fun, easy, colorful, dazzling, shiny experiment! Here is how I did it:

First, get a few balloons. Put the mouth of the balloon on the tap. On the tap and hold the balloon from the top and bottom. When it has gotten a bit filled (around 1 – 1.5 cups of water), then close the tap. Tie the mouth of the balloon and keep it in the freezer for 1 day.
The next day, the fun begins! Take the balloon out of the freezer, put it in a bowl and cut the mouth and tear off the balloon. Now comes the messy bit. Sprinkle some salt on it and add a few drops of food coloring. Secret tip: Liquid food coloring works better than gel food coloring.

You could take it further by using drinking water to make the icy ball. Then you can use rose or khus sherbet instead of food coloring and enjoy the treat. You will have to use limited salt though!

How it works

The salt melts the ice. The ice becomes water and it starts flowing down. If you add food colors, the beautiful patterns get created.

Imagine that you are sitting quietly and doing your homework. Let’s say your father comes in and interrupts you along with your pet puppy. Your puppy gets really excited on seeing you and goes crazy. Then your pet and you start running around together and having lots of fun. Your father is just standing on the side.
Similarly, Salt is made up of Sodium molecules (your pet puppy) and Chloride molecules (your father). When they interact with Water molecules (you), the Sodium and Water (puppy and you) get attached and start flowing on the ice as if you were playing tag on snow.

Real Life

This same Salt method is used in US to remove ice and snow from the roads. If ice is not removed from the roads, then accidents can happen because the ice is so slippery. I read on Google that 15 billion kilograms of salt is used every year in US and this de-icing keeps the traffic moving. But it also has some disadvantages. Too much salt damages the roads. The salt also gets wasted in de-icing roads. Also, all the water flows into rivers and seas and makes them salty. Two things happen because of this – The drinking water that comes from seas and rivers is salty. So, to make it unsalty, there is a lot of processing that needs to be done by workers. Second, the fishes, underwater creatures and plants can get sick and die. Sometimes there is shortage of salt in US because of this. But there is also no other better way to do de-icing of roads right now. Let us hope scientists discover a solution soon.

Until then, you can enjoy a video of how I did the experiment and the dazzling icy orbs I created at home.

Icy Orbs by Yuvika Sharma

1. Pictures and Videos – My mom
2. Experiment – Home Lab book by Robert Winston
3. Research – Google about de-icing

Electricity : Physics

I made a LEMON BATTERY today. I used these things:


  1. Six short electrical leads with crocodile clips at each end
  2. Five Lemons
  3. Five galvanized screws
  4. LEDs
  5. Five copper coins (1 cent US coins works)
  6. A sharp knife

First, make a cut in the lemon with the sharp knife. It should be a around 1 cm from the center. Put a copper coin in the hole you made. Do the same with the rest 4 Lemons. After that, put a galvanized screw on each of the 5 Lemons. If you turn the Lemon so that the copper coin is on the side, you should see a galvanized screw about 2 inches above from your work place. Remember that one end of the crocodile clip should be on the coin of a lemon and the other end should be on the screw of a different lemon. Put the Lemons in a circle. Squeeze the crocodile clips on one side of the Lemon – on the galvanized screw. Squeeze the other side on the other Lemon’s Copper coin. Do the same with the rest 4 Lemons. Put the rest 2 sides of crocodile clips on the LED. If it does not work, you can use the LED in the Snap Circuit kit. You will see that the LED lights up!

Doing the experiment
Zoomed in circuit
Lemon Battery Circuit
LED lights up!

I tried another experiment – It is the same, but it is with a POTATO instead of lemons! Do try the experiment out!

Potato Battery Circuit

Guess what? The experiment worked! I wondered how come. I also played by using different color LEDs and by changing the number of lemons and potatoes. It was a lot of fun! Let me share some of the observations I had.

  1. The LED in the Potato experiment glowed more than the LED in the lemon experiment.
  2. With the lemon experiment – if I did 1-3 lemons the LED did not glow. I had to put 4 to get a dim light and 5 lemons to get a little more glowing light.
  3. With the potato experiment – if I did 1 potato there was no light but if I did 2 or more there was a dim light or a glowing light.
  4. When I took out the screws and coins, their color was different! I think that happened because of the chemical reaction.
Experimenting and Playing with the Lemon and Potato Batteries
Lemon Potato Battery

I then joined both the circuits. I put an LED at 1 spot and 1 LED at another spot. I closed all the doors and put the lights OFF and this is a picture of then. I found this very interesting so I decided to do some more research. I researched about how this works and this is what I found out.

How it works

Physics is the study of just 2 things – Matter, and Energy.

Take a spoon. What do you think it is made up of?

That spoon is made up of a combination of different ELEMENTS. There are different types of MOLECULES in each element. Many ATOMS become a molecule.

Inside each ATOM, there are things called ELECTRONS. They circle the Nucleus, which is made up of Protons and Neutrons. Protons are Positive (+) and Electrons are Negative (-). Neutrons are none of these. They, together, in the circle form an Atom.

Electricity is the Electrons flowing and jumping. They get very excited and start moving to wherever they can.

What’s in a Battery?

In a Battery, there is a chemical reaction that happens. This makes the Electrons excited and jumpy and makes them flow. That produces electricity.

There are 3 parts inside a battery – Little cathode, A lot of electrolyte, and little anode. In the middle of electrolyte there is a sheet. When anode and electrolyte react, they produce jumpy electrons. These electrons are negative and so they want to go to a positive place. When cathode and electrolyte mix, they make a positive place to attract the electrons. They go through the wire and light up the bulb.

(Reference Image from Google)

How does it work with Lemons and Potatoes?

The Lemons/potatoes are the Electrolyte.

The anode is the galvanized screws which have Zinc coating.

The cathode is the Copper coins.

There is a chemical reaction inside and that is how the coins’ and screws’ color changes. Lemon has citric acid and Potato has Phosphoric acid. I think it can also work with Oranges because they also have Citric acid. It might work with Apple since it has malic acid. It might also work with tomatoes because it has Citric acid and Malic acid. I will experiment with a Multimeter to measure how much electricity gets produced in each. Stay tuned for my next post on this topic.

Penguins, Antarctica and Climate Change

I read a book, Magic Tree House Merlin Mission #12. It was about how Jack and Annie go to Antarctica, they fall into a crack called crevasse, and then meet an Emperor Penguin who is wearing a crown. There were scientists who were trying to discover and research about many stuff. In school, we were learning about Sharing the planet. I thought I share the planet with Penguins and can find out more about them. I found out that some penguins are endangered. Also, I love animals and I want to help the world. I also like the cold season, so I thought Antarctica would be a good place to research about.

I started by asking the following questions about Penguins and Antarctica:
* What are species of penguins?
* What do they eat?
* How do they hunt for their food?
* How do they breathe underwater?
* Why do penguins waddle and walk?
* Where do they live?
* Why do they need so cold temperature? I saw penguins in Cape Town in South Africa. How did those penguins not need cold weather?
* How cold is Antarctica?

As I was doing research, I found out that climate change is impacting Antarctica! I wanted to find out more. I did research using Google, National Geographic, YouTube Videos, NASA Videos and Magic Tree House Fact Tracker Series about Antarctica. I put my findings into a Rhyming Poem about Penguins, an Acrostic Poem about Antarctica and showcased about Climate Change using an interactive video that I created using Scratch 3.0.

Poem about Penguins

In my research, I also learnt other facts about Penguins that are not in the poem. Penguins have webbed feet and short legs. So they waddle. Also, waddling helps them conserve energy and that is how they walk for 150 miles. I also learnt that Penguins have a thick layer of fat, thick skin and tightly packed feathers that keep them warm. Out of 18 species of Penguins, only 4 need cold weather. The rest 14 species can live in warm weather. The species in South Africa that I saw is called African Penguin. They don’t need cold weather. The ones in Antarctica have high body temperature so that it can keep them warm in cold weather.

Acrostic poem about Antarctica

I made an interactive video about Global Warming in Antarctica and what we can do about it. Click on the link below to check it out.

Interactive Video

I hope you enjoyed reading about it and will do the actions shared above. What other actions can we take? Write in the comments to share your thoughts.

Color Theory

In school, I am learning about color theory. I am also learning about a color wheel. Primary colors are colors that can’t be formed by any other type of color. They are how all other colors are made. There are three (3) primary colors which are Red, Yellow, and Blue. By mixing primary colors you can get a Secondary color. By mixing Red and Yellow you get Orange. Orange is a secondary color. By mixing Yellow and Blue we can get Green. Green is also a secondary color. By mixing Red and Blue we can get Purple. Purple is also a secondary color. By arranging these in a particular order we get the rainbow colors, red, orange, yellow, green, blue, purple. By mixing a primary and secondary color we get a Tertiary color. Color wheel is a way of organizing all these colors. On a color wheel, the opposite color is called a complimentary color. Here is a example of a color wheel that I made.

Color wheel

If you see, the primary colors are equally distanced. So are the secondary. I learnt many interesting things about the color wheel. The first color wheel was formed by Isaac Newton in 1666. A synonym (2 words that have the same meaning) of color is hue. A shade of a color is if you add some black to the color and the tint is when you add some white to the color. An analogous color set is that of 3 sticking hues. A harmonious color palette is a set of colors that looks pleasing to the eye. Complimentary colors (opposite colors on the color wheel) are harmonious colors (looks very pleasing to the eye). The nature colors, Red, and Green are also harmonious colors (because they look pleasing to the eye). Achromatic means there are 0 (zero/no) colors. Monochromatic means it has only 1 (one) color, so it might mean it is a plain sea, or it might mean there are shades and tints. Polychromatic means that the painting has more than 1 (one) color.

Now, let me show you an interesting experiment. Look at these. Are the small rectangles inside the big ones (the ones in light blue) – same color or different color?

Over here the blue rectangle in the pink background looks darker.

But this is actually the same!

Here is another experiment I tried. I took a Henry Matisse painting (see below). It only uses yellow, blue, green colors (with very little red). I colored the same painting in complimentary colors (see below). How does that change the mood of the painting for the viewer? I think in complimentary colors, it looks sadder and darker. What do you think?

Hope you enjoyed learning about Colors with me.

Henry Matisse original painting

My complimentary painting

Learning about Safe Online Behavior

I played an online game, which is conducted by Google. It is called Interland. It teaches kids about safety in the online world, but in a fun way. In it, there are four (4) levels. Each of them teaches about a new skill. If we follow these, we can be digital role models.

Where and how do I play this game?

To play that game click Interland – Be internet Awesome. Then, click on Let’s do this!. Choose the level (1- 4) you want to play! Then, you can play the game and have fun! I strongly recommend this game to every school kid. It is free to play.

What happens in the 4 levels?

In the First level, you have to make the crying kids happy. You also have to remember to destroy the bullies! To destroy the bullies, you have to find and collect a speaker, and come in front of the bully and click the space bar. Then the bully will be destroyed for once, and for all! Use the arrow keys to move. If you wan’t to jump, hold the up arrow key, and click the side you wan’t to go. To make someone happy, give some hearts. Click the space bar if you wan’t to give a good vibe to someone. The big, yellow people are the bullies. On a scale of my liking of this among all of the levels is 2nd. I learnt to be alert about bullies on the internet and that if I see an internet bully, I should speak up and report them to an adult. I also learnt that it is a good idea to be kind to the people who are being bullied because then it makes them happy.

In the second level, you have to answer some questions. There are some rocks that appear. On each rock, there is one option. You have to point towards the correct rock and click the space bar if you think it is the correct option. If you do it correct, you jump on the next rock, and if you do it wrong you fall into the river. Some questions also have timers, so you also need to have speed and do it fast! On a scale of my liking of this among all of the levels is 4th. I learnt about phishing and how there can be bad people who can trick you to get your information and steal money from you. So, we must be careful and think about whether it is true or not.

In the third level, you learn about who to send what information to. There are many mirrors and you have to make the laser go and reflect on the mirror so that it gets reflected on another mirror. You also can’t let the other people know about your information. The blue colored people are your family, the green colored people are your friends, the yellow colored people are any random people, and the red people are bad people. Click the space bar to share the information. Use the arrow keys to find a spot to shoot. On a scale of my liking of this among all of the levels is 3rd. I learnt to give information to only those people who I know should get it. Also we must be careful about who we share information with.

In the fourth level, there are four (4) sections. First, you have to secure you Emails and messages from hackers. You have to collect 6 messages and 6 Emails. If you bang into a rock, the hacker will steal some of your Emails and messages and the number of messages and emails will be decreased. When you get 6 of both, you have to secure your phone information and credit card information. It works similarly as the 1st section. Once you put all this in the castle, next, you have to protect the five (5) doors of the castle. The hacker wants to get in the castle to steal all your information. So, they try to come in your castle by breaking the doors. You have to save the doors by using the arrow keys to hop from one to another. Then, click the space bar if you wan’t to choose a good and strong password. I will ask you the strongest password. Click the correct one. When one tower is very secure, and not a single person can come in, it will show a lock. You have to try to have a lock on each of the 5 doors. In the next section, you will have lots of signs, and letters. It will ask you some questions. As you answer them, you will keep making a password. Finally, you will make a very strong password. On a scale of my liking of this among all of the levels is 1st. I learnt about not sharing any personal information with anyone and about which can be my strongest password. It should be 8 characters long, have uppercase and lowercase and numbers and special characters.

Key points I learnt in each level of the game
My certificates