Science is a great way to engage children in hands-on learning. Kids love to experiment, ask questions, and explore the world around them.
Simple science experiments at home can introduce them to scientific concepts in a fun and interactive way. These activities also develop problem-solving skills, creativity, and curiosity.
If you’re looking for science experiments for preschoolers, easy experiments of science, or fun science projects that you can do at home, this guide has you covered. These experiments use household items and demonstrate exciting scientific principles.
Make a Volcano Erupt with a Simple Kitchen Experiment
Materials Needed:
- 1 small container or bottle
- Baking soda
- Vinegar
- Dish soap
- Food colouring
- A tray or a large bowl to catch spills
Steps to Follow:
✔ Place the small container on a tray to contain the mess
✔ Add 2 tablespoons of baking soda into the container
✔ Squeeze a small amount of dish soap into the container (this enhances the foamy effect)
✔ Drop in a few drops of food colouring to make the “lava” look real
✔ Pour in about ½ cup of vinegar and watch as the volcano erupts
Why It Works:
This science experiments volcano works because of a chemical reaction between an acid (vinegar) and a base (baking soda). When mixed, they create carbon dioxide gas, causing bubbling and foaming—just like a real volcanic eruption!
Create a Homemade Lava Lamp
Materials Needed:
- A clear bottle or jar
- Vegetable oil
- Water
- Food colouring
- Effervescent tablets (Alka-Seltzer or similar)
Steps to Follow:
✔ Fill the bottle one-third of the way with water
✔ Add a few drops of food colouring to the water
✔ Pour vegetable oil into the bottle until nearly full (watch how the oil sits on top of the water)
✔ Drop in an effervescent tablet and observe how the bubbles move
Why It Works:
This cool science experiment showcases the principle of liquid density. Oil is less dense than water, so it floats on top. When the effervescent tablet dissolves, it releases gas bubbles that carry coloured water to the top before sinking back down.
Grow Crystals with a Supersaturated Solution
Materials Needed:
- 1 cup of hot water
- 3 tablespoons of borax
- A pipe cleaner
- A glass jar
- A string and a pencil
Steps to Follow:
✔ Bend a pipe cleaner into a fun shape, such as a star or a spiral
✔ Tie a string to the pipe cleaner and attach it to a pencil
✔ Place the pencil across the jar so the shape hangs inside
✔ Dissolve borax in hot water, stirring until fully dissolved
✔ Pour the solution into the jar, making sure the pipe cleaner is fully submerged
✔ Let it sit overnight and check the next day to see the beautiful crystals forming
Why It Works:
This science experiment preschool activity teaches kids about supersaturation. The dissolved borax formed solid crystals on the pipe cleaner when the water cooled.
Walking Water: A Colour Mixing Experiment
Materials Needed:
- 6 clear cups
- Water
- Paper towels
- Food colouring (red, yellow, blue)
Steps to Follow:
✔ Fill three cups with water and add food colouring (one colour per cup)
✔ Arrange the cups in a circle, placing empty cups between the coloured ones
✔ Fold paper towels into strips and place them between the cups, allowing one end to dip in the coloured water and the other in the empty cup
✔ Watch as the water “walks” through the paper towel, mixing colours along the way
Why It Works:
This easy experiment for science demonstrates capillary action, where water moves through the paper towel fibres. It’s the same process plants use to absorb water through their roots.
Make a Balloon Inflate Without Blowing It Up
Materials Needed:
- 1 balloon
- 1 empty plastic bottle
- 1 teaspoon of yeast
- 1 tablespoon of sugar
- Warm water
Steps to Follow:
✔ Fill the bottle with warm water and add sugar
✔ Add the yeast and gently swirl the bottle to mix
✔ Stretch the balloon over the mouth of the bottle
✔ Leave it in a warm place and watch the balloon gradually inflate
Why It Works:
This science project at home introduces kids to fermentation. Yeast feeds on sugar and releases carbon dioxide gas, which inflates the balloon.
Invisible Ink: A Secret Science Craft for Preschool
Materials Needed:
- Lemon juice
- Cotton swabs
- White paper
- A heat source (light bulb or warm surface)
Steps to Follow:
✔ Dip the cotton swab into lemon juice and write a secret message on the paper
✔ Let the juice dry completely
✔ Hold the paper near a light bulb or warm surface
✔ Watch your secret message appear
Why It Works:
Lemon juice oxidises when exposed to heat, making the writing visible. This simple science experiment is a great way to introduce children to chemical reactions.
Static Electricity: Make Paper Dance with a Balloon
Materials Needed:
- A balloon
- Small paper scraps
- A woollen jumper
Steps to Follow:
✔ Inflate the balloon and tie it securely.
✔ Cut small scraps of paper and place them on a flat surface.
✔ Vigorously rub the balloon against a woollen jumper, fleece, or hair for about 30 seconds.
✔ Slowly bring the balloon close to the paper scraps without touching them.
✔ Watch as the tiny paper pieces jump and stick to the balloon!
Why It Works:
This easy science experiment to do at home demonstrates static electricity. Rubbing the balloon picks up extra electrons from the wool or hair, giving it a negative charge. Since opposite charges attract, the positively charged paper scraps are pulled towards the balloon and stick to it.
Extra Fun:
- Balloon and Water Trick: Hold the charged balloon near a thin stream of running water, and watch as the water bends towards the balloon!
- Balloon on the Wall: After rubbing the balloon, press it against a wall and see how long it sticks.
- Two Balloons Experiment: Charge two balloons and hang them from strings. When they are brought close together, they repel each other because, like charges, they push away!
The Floating Egg: A Simple Density Experiment
Materials Needed:
- 2 clear glasses
- Water
- 1 fresh egg
- 3 tablespoons of salt
- A spoon for stirring
Steps to Follow:
✔ Fill both glasses with equal amounts of water, leaving enough space to place an egg inside.
✔ In one glass, leave the water plain (this will act as your control).
✔ In the second glass, add three tablespoons of salt and stir well until the salt is completely dissolved.
✔ Carefully place an egg in plain water and observe what happens—it will sink to the bottom.
✔ Now, gently place an egg into the saltwater solution and watch as it floats to the top.
Why It Works:
This science activity for preschoolers is a great way to teach density and buoyancy. In fresh water, the egg sinks because it is denser than the water. When added salt increases the water’s density, making it denser than the egg, the egg floats.
Extra Fun:
- Try adding more or less salt to see how much is needed to make the egg float.
- Drop other small objects (like a grape or a coin) into saltwater and fresh water to compare their buoyancy.
- Have kids predict whether objects will sink or float before testing them.
This is one of the best science experiments for kids because it’s easy, interactive, and visually engaging!
DIY Rainbow in a Glass
Materials Needed:
- 5 small cups or glasses
- 1 large clear glass (for layering the colours)
- Warm water
- Sugar
- Food colouring (red, yellow, blue, green, and purple)
- A spoon for stirring
- A dropper or a spoon for layering
Steps to Follow:
✔ Fill five small cups with equal amounts of warm water.
✔ Add different amounts of sugar to each cup to create solutions of varying densities:
- Cup 1: No sugar (least dense)
- Cup 2: 1 teaspoon of sugar
- Cup 3: 2 teaspoons of sugar
- Cup 4: 3 teaspoons of sugar
- Cup 5: 4 teaspoons of sugar (most dense)
✔ Stir each cup well until all the sugar is completely dissolved.
✔ Add a different food colouring to each cup to make them visually distinct.
✔ Start layering the solutions in the large clear glass. Begin with the most concentrated (densest) solution first (Cup 5).
✔ Slowly pour each layer over the back of a spoon or use a dropper to prevent the liquids from mixing too quickly.
✔ Continue adding layers from the most dense to the least dense.
Why It Works:
This easy science experiment demonstrates liquid density. The more sugar is dissolved in the water, the denser the liquid becomes.
Because denser liquids sink and less dense liquids float, each layer stays separate, forming a rainbow effect. If poured too quickly, the layers may mix, so slow and steady pouring is key to maintaining the rainbow!
Fun with a Simple Circuit
Materials Needed:
- A small light bulb (such as an LED or flashlight bulb)
- A battery (AA, AAA, or 9V)
- Aluminium foil
- Scissors (optional, for cutting the foil into strips)
Steps to Follow:
✔ Cut a long strip of aluminium foil, about 2 cm wide, to use as a wire substitute.
✔ Hold one end of the foil strip against the battery’s negative (-) terminal.
✔ Touch the other end of the foil to the metal base of the light bulb.
✔ Now, take another strip of foil and connect the positive (+) terminal of the battery to the side of the bulb.
✔ Ensure both foil strips touch the bulb and battery simultaneously, completing the circuit.
✔ Watch as the bulb lights up, showing how electricity flows through a closed loop!
Why It Works:
This easy science experiment demonstrates basic electrical circuits and conductivity. The battery provides energy, the foil acts as a conductor, and the bulb lights up when the circuit is complete.
This is how real electrical circuits work in appliances, lights, and toys! If the bulb doesn’t light up, check the connections—electricity needs an uninterrupted path to flow.
Final Thoughts
These easy-to-do home science experiments are fun, engaging, and educational. Whether you’re looking for science crafts for preschoolers, home science activities, or fun science experiments, these ideas are great for developing curiosity and a love for science.
With easy scientific experiments, you can turn any home into a science lab for kindergarten learners and beyond.