Science isn't just something that happens in laboratories with fancy equipment — some of the most mind-blowing experiments can happen right in your kitchen! I'm Parikshet, and science experiments are one of my favourite weekend activities. My dad and I have done dozens of these together, and I'm sharing the 20 best ones we've tried. Each experiment uses things you can find at home, teaches real science, and — most importantly — is genuinely amazing to watch.
I've organised them by how easy they are, starting with the simplest ones that even very young kids can do with a little help. Let's do science!
Before You Start: Safety First
Even though these experiments use safe household materials, here are a few rules to follow every time:
- Always have an adult present, especially for experiments involving hot water, sharp objects, or fire
- Wear old clothes — some of these get messy!
- Read through the full experiment before you start so there are no surprises
- Clean up your workspace when you're finished
- Never taste or eat any experimental materials unless the experiment specifically says to
Beginner Experiments (Ages 4-8)
These experiments are simple, safe, and deliver a wow result quickly — perfect for younger scientists.
1. Baking Soda Volcano
What you need: Baking soda, white vinegar, red food colouring, a container, dish soap (optional)
What to do:
- Place your container (a cup, bottle, or mould shaped like a volcano) on a tray to catch the overflow
- Add 2 tablespoons of baking soda to the container
- Add a few drops of red food colouring
- Optional: add a small squirt of dish soap (it makes the foam extra bubbly)
- Pour in about half a cup of vinegar and watch the eruption!
The science: Baking soda is a base and vinegar is an acid. When they mix, they react to produce carbon dioxide gas — those bubbles are actual CO2! This is called an acid-base reaction, and it's the same type of reaction happening in your stomach when you take some medicines for indigestion.
Parikshet's tip: Try adding more baking soda for a longer eruption, or less vinegar for a slower, bubblier one. We tried making the volcano out of clay one time — it took an hour to build but looked incredible!
2. Colour-Changing Cabbage Juice pH Indicator
What you need: Red cabbage, water, various household liquids (lemon juice, vinegar, milk, baking soda solution, water), white cups
What to do:
- Chop red cabbage into small pieces and place in a bowl
- Pour boiling water over the cabbage (adult help needed) and let it sit for 10 minutes
- Strain the water into a jar — it should be a deep purple colour. This is your pH indicator!
- Pour a small amount of cabbage juice into each cup
- Add a different liquid to each cup and observe what colour it turns
The science: The purple pigment in red cabbage contains molecules that change shape (and colour!) depending on whether a liquid is an acid or a base. Acids turn it pink/red; bases turn it green/yellow. This is exactly how professional chemists test solutions in laboratories.
3. Walking Water Rainbow
What you need: 7 glasses, paper towels, water, red, yellow, and blue food colouring
What to do:
- Line up 7 glasses in a row
- Fill glasses 1, 3, 5, and 7 with water (leave 2, 4, and 6 empty)
- Colour glass 1 red, glass 3 yellow, glass 5 blue, glass 7 red
- Fold paper towels into long strips and drape one between each adjacent glass, with one end in each glass
- Wait 30-60 minutes and watch what happens!
The science: Water travels up and through the paper towel by capillary action — the same process that lets trees pull water from the soil all the way up to their leaves. As the coloured water travels into the empty glasses, colours mix to create orange (red + yellow), green (yellow + blue), and purple (blue + red).
4. Elephant Toothpaste
What you need: 3% hydrogen peroxide (from pharmacy), dry yeast, warm water, dish soap, food colouring, a tall bottle or large cup
What to do:
- Pour half a cup of hydrogen peroxide into the bottle. Add a good squeeze of dish soap and food colouring. Swirl gently to mix
- In a separate small cup, mix one packet of dry yeast with 3 tablespoons of warm water. Stir for about 30 seconds
- Pour the yeast mixture into the bottle with the peroxide mixture
- Stand back and watch the foam erupt!
The science: Hydrogen peroxide naturally breaks down into water and oxygen gas, but very slowly. Yeast contains a biological catalyst (an enzyme called catalase) that dramatically speeds up this decomposition. The oxygen gas produced gets trapped in the dish soap, creating a huge, rapid foam eruption. The reaction is also slightly warm — you can feel it if you touch the foam!
5. Dancing Raisins
What you need: A clear glass, carbonated water or lemonade, raisins
What to do:
- Fill a clear glass with sparkling water or clear carbonated lemonade
- Drop in 5-6 raisins
- Watch what happens over the next few minutes!
The science: Raisins are denser than the liquid, so they sink. But then CO2 bubbles from the carbonated drink stick to the wrinkled surface of the raisins, making them buoyant enough to float to the surface. At the top, the bubbles pop, the raisins become dense again, and they sink — where more bubbles form and the cycle repeats!
Intermediate Experiments (Ages 8-12)
These experiments involve more steps, more interesting science, and require a bit more attention to detail.
6. Homemade Lava Lamp
What you need: A clear plastic bottle or tall glass, water, cooking oil, food colouring, effervescent antacid tablets (like Alka-Seltzer)
What to do:
- Fill the bottle about one quarter full with water
- Add food colouring to the water and mix
- Fill the rest of the bottle with cooking oil (leaving a small gap at the top)
- Wait for the oil and water to fully separate
- Break an antacid tablet into quarters. Drop one piece in and watch!
The science: Oil and water don't mix because water is polar (its molecules have positive and negative ends) and oil is non-polar. The antacid tablet reacts with the water to produce CO2 gas bubbles, which carry coloured water droplets up through the oil. When they reach the top, the gas escapes, and the water drops back down. This mimics the exact same process in real lava lamps, which use heat instead of a chemical reaction.
7. Invisible Ink with Lemon Juice
What you need: Lemon juice, water, a cotton bud or small brush, white paper, a lamp or heat source (adult required)
What to do:
- Mix equal parts lemon juice and water in a small bowl
- Dip the cotton bud in the mixture and write a secret message on white paper
- Let it dry completely — the message will become invisible
- To reveal the message: hold the paper close (but not touching) to a light bulb, or have an adult briefly hold it over a candle flame or warm it in an oven at low temperature
The science: Lemon juice contains carbon compounds that are colourless at room temperature but oxidise and turn brown when heated. This is the same chemical process that causes apple slices to go brown when exposed to air. Spies actually used lemon juice invisible ink in real historical situations!
8. Non-Newtonian Fluid (Oobleck)
What you need: Cornflour (cornstarch), water, food colouring (optional)
What to do:
- Mix 2 cups of cornflour with 1 cup of water in a large bowl. Add food colouring if desired
- Mix until you get a thick, gooey substance. You may need to adjust the ratio slightly
- Now experiment: punch it quickly — it feels solid! Pick it up slowly — it drips like a liquid!
The science: Oobleck is a non-Newtonian fluid — a substance that doesn't behave like a normal liquid or solid. When force is applied quickly, the cornflour particles lock together and it acts like a solid. When force is slow and gentle, the particles have time to move around each other and it flows like a liquid. Quicksand is a natural version of a non-Newtonian fluid!
9. Static Electricity Butterfly
What you need: A balloon, a butterfly cut from thin tissue paper
What to do:
- Cut a butterfly shape from thin tissue paper — make the wings as large as possible
- Rub the balloon vigorously on your hair for about 30 seconds
- Hold the balloon close to (but not touching) the butterfly and watch it lift towards the balloon!
The science: Rubbing the balloon on your hair transfers electrons to the balloon, giving it a negative charge. The neutral tissue paper gets attracted to this charge (opposite charges attract) and the paper butterfly literally flies! This is exactly the same principle as how lightning works — a massive build-up of static charge that suddenly discharges.
10. Milk Plastic (Casein Plastic)
What you need: Whole milk (1 cup), white vinegar (4 teaspoons), a saucepan, a strainer, paper towels (adult required for heating)
What to do:
- Heat the milk in a saucepan over medium heat until it begins to simmer (adult step)
- Remove from heat and add the vinegar. Stir gently for about a minute — you'll see clumps forming
- Pour through a strainer. Discard the liquid (whey). The clumps are your material!
- Let the clumps cool slightly, then squeeze out as much liquid as possible using paper towels
- Mould the warm material into any shape you like. Place on a surface and let it dry for 2 days
The science: Milk contains a protein called casein. When acid (vinegar) is added to warm milk, the casein molecules unfold and link together into long chains — a process called denaturation and polymerisation. This creates a natural plastic! In the early 20th century, casein plastic (called Galalith) was commercially produced and used to make buttons, combs, and jewellery.
11. Cloud in a Jar
What you need: A glass jar, hot water (adult required), ice cubes, a metal baking tray or bag of ice, hairspray
What to do:
- Pour about an inch of hot water into the jar (adult step)
- Place the metal tray filled with ice on top of the jar
- Quickly lift one edge of the tray and spray a brief spritz of hairspray into the jar, then replace the tray
- Watch a cloud form inside the jar! When ready, remove the lid and watch the cloud escape
The science: Clouds form when warm, moist air meets cold air and the water vapour condenses around tiny particles. The warm water provides moisture, the ice provides cold, and the hairspray particles provide the tiny surfaces for water droplets to condense around — just like real cloud seeding! This experiment recreates an actual weather phenomenon.
12. Paper Bridge Strength Challenge
What you need: Sheets of paper, tape, coins or small weights, two stacks of books
What to do:
- Place two stacks of books about 15cm apart
- Using only a single sheet of paper (you can fold it any way you like) and a small piece of tape, build a bridge between the two stacks
- Start adding coins one by one. How many can your bridge hold?
- Try different designs and see which is strongest
The science: This is structural engineering! Flat paper folds easily under weight, but folded paper creates structural depth (like an I-beam) that dramatically increases strength. Corrugated cardboard uses this principle — the wavy inner layer provides rigidity far beyond what the same amount of flat cardboard could. Real bridges use similar principles scaled up enormously.
Advanced Experiments (Ages 10-14)
13. Extracting DNA from a Strawberry
What you need: Strawberries, dishwashing liquid, salt, cold rubbing alcohol, a plastic bag, a coffee filter, two glasses
What to do:
- Mash a strawberry in a sealed plastic bag until completely pureed
- Add 1 tablespoon of dishwashing liquid and a pinch of salt. Mash gently for another minute
- Strain the mixture through a coffee filter into a glass. You should get a clear pink liquid
- Gently pour cold rubbing alcohol down the side of the glass so it sits in a layer on top of the strawberry liquid
- Watch the DNA appear as white, stringy strands at the boundary between the layers. Spool it up on a toothpick!
The science: The dishwashing liquid breaks open the strawberry cells to release the DNA. The salt helps the DNA strands clump together. DNA dissolves in water but not in alcohol — so when the alcohol is added, the DNA strands precipitate out of solution and become visible as white strings. Strawberries are ideal because they have 8 copies of each chromosome (most organisms have 2), giving a much larger yield.
14. Cartesian Diver
What you need: A 2-litre plastic bottle with cap, water, a small sauce packet (tomato ketchup or soy sauce works well)
What to do:
- Fill the bottle completely with water, leaving no air gap
- Drop the sauce packet in — it should just barely float (if it sinks, try a different packet or add a tiny bit of air to the packet)
- Seal the bottle tightly
- Squeeze the sides of the bottle hard. The packet sinks! Release, and it floats again
The science: Squeezing the bottle increases the pressure inside. This compresses the tiny air bubble in the sauce packet, making it denser than the water — so it sinks. When you release, the pressure drops, the air expands, and the packet becomes less dense than water again — so it floats. This is the same principle that fish use with their swim bladders to control their depth!
15. Homemade Electromagnet
What you need: A large iron nail, copper wire (about 1 metre), a 9V battery, small metal objects (paperclips, staples)
What to do:
- Leave about 15cm of wire free at the start, then tightly coil the remaining wire around the nail in one direction, as many times as possible
- Leave another 15cm free at the end
- Touch the two free wire ends to the two terminals of the battery (briefly — the battery and wire will get warm)
- While connected, test what your electromagnet can pick up!
The science: Electricity flowing through a wire creates a magnetic field around it. Coiling the wire amplifies this effect, and the iron nail becomes magnetised by the surrounding field, turning it into an electromagnet. This is how electric motors, MRI machines, and speakers work! More coils and more current = stronger magnet.
16. Growing Crystals with Borax
What you need: Borax powder, boiling water, pipe cleaners, a stick, a glass jar (adult required for boiling water)
What to do:
- Twist pipe cleaners into an interesting shape that will fit inside the jar
- Tie a string to the shape and tie the other end to a stick so the shape hangs inside the jar without touching the sides
- Adult step: dissolve 3 tablespoons of borax in 1 cup of boiling water. Stir until completely dissolved
- Pour the solution into the jar over the pipe cleaner shape
- Let it sit undisturbed for 24 hours and observe the crystals that form!
The science: The boiling water dissolves more borax than cool water can — a saturated solution. As the solution cools, the borax molecules have less energy and begin to arrange themselves into their natural, repeating crystal structure on the pipe cleaner surface. The same principle explains how natural gemstones like amethyst and quartz form underground over millions of years.
17. Simple Motor (Homopolar Motor)
What you need: A AA battery, a neodymium magnet (small disc magnet), a length of bare copper wire
What to do:
- Stack the magnet on the negative (flat) end of the battery
- Shape the copper wire into a symmetrical sculpture (a simple zigzag or spiral works) that balances upright on the positive end of the battery, with the wire ends touching the magnet
- When both ends of the wire are making contact (positive terminal at top, magnet at bottom), the wire sculpture should start spinning!
The science: This is the simplest electric motor possible. Electricity flows through the wire from the positive terminal to the magnet. The magnetic field from the magnet exerts a force on this current-carrying wire (the Lorentz force), which causes it to rotate. Every electric motor from a toy car to a wind turbine uses this principle.
18. Making a Periscope
What you need: A long cardboard box (or two cardboard tubes), two small mirrors or mirror-finish card, scissors, tape
What to do:
- Cut rectangular holes at both ends of the box/tube, on opposite sides
- Mount a mirror at 45 degrees at each end, facing opposite directions, so light entering one hole bounces off the first mirror to the second mirror, then out through the bottom hole
- Look through the bottom hole and you should see what's above the level of the top hole!
The science: Light travels in straight lines, but mirrors change its direction. By angling two mirrors precisely at 45 degrees, you redirect light by exactly 90 degrees twice — a total of 180 degrees. Submarines use periscopes with this exact design, just with much more precise optical components.
19. Yeast Respiration Balloon
What you need: A small plastic bottle, active dry yeast, warm water, sugar, a balloon
What to do:
- Pour half a cup of warm water into the bottle
- Add one teaspoon of yeast and one teaspoon of sugar. Swirl gently
- Quickly stretch the balloon over the mouth of the bottle
- Place in a warm spot and check every 15 minutes
The science: Yeast is a living microorganism that eats sugar and releases carbon dioxide as a waste product — a process called fermentation. The CO2 gas produced inflates the balloon. This is the same process that makes bread rise! Bakers add yeast to bread dough, and the CO2 bubbles make the dough puff up before baking.
20. Paper Chromatography (Separating Colours)
What you need: Coffee filter paper, washable markers (black works especially well), water, a pencil, a glass
What to do:
- Cut the coffee filter into a strip about 2cm wide and 15cm long
- Draw a thick dot of black marker about 2cm from the bottom of the strip
- Pour about 1cm of water into the glass
- Hang the strip so the bottom just touches the water (the ink dot should be above the water line)
- Watch the water travel up the paper and separate the ink into its component colours!
The science: Black ink is actually a mixture of several coloured pigments. As water travels up the paper, it carries the pigments with it — but different pigments travel at different speeds depending on their molecular size and how strongly they bond to the paper. They separate into distinct bands of colour. Scientists use this technique (chromatography) to identify unknown substances, including drugs, pollutants, and food dyes.
Tips for Making the Most of Home Science
- Write it down — Keep a science notebook. Record what you expected to happen, what actually happened, and why you think the result was the way it was. This is exactly what real scientists do.
- Change one variable at a time — If you want to know what affects an experiment's result, only change one thing at a time. For example: does the dancing raisins experiment work better with more fizzy or less fizzy water? Test it!
- Repeat experiments — One result might be an accident. Three consistent results tell you something real. Scientists call this reproducibility.
- Ask "why" — Don't just be impressed by the result. Ask why it happened. Look it up. Discuss it. The explanation is where the real learning happens.
- Have fun and don't worry about failures — Some experiments don't work on the first try. That's not failure — that's data! Ask what went wrong and try adjusting your approach.
Conclusion: Science Is Everywhere
These 20 experiments are just the beginning. Once you start seeing the science in everyday things — why bread rises, how rainbows form, why some things float and others sink — you start noticing experiments everywhere you look. The world becomes a giant laboratory.
My dad always says the best scientists aren't just the smartest people — they're the most curious. And curiosity is something every kid is born with. Keep asking questions, keep experimenting, and most importantly, keep having fun with science!
— Parikshet, KidsFunLearnClub