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In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

This project compares the strength of one, two, and three-ply toilet paper.

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

In this science fair project, young children discover what happens when two fluids that have different densities get together.

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?

This science fair project idea explores how length affects the weight a bridge can hold.

Can a toy car determine the strength of a magnet? In this cool magnet science fair project, young scientists will learn how to measure the strength of a magnet.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

Learn about this simple machine and make a pulley of your own to use for fun science trials.

This science fair project explores how osmotic pressure forces water through the root up into the plant.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

This science fair project idea investigates the hardness property of minerals.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

Do you think heat can affect a plant's growth rate?

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

This science fair project idea determines what household items are good conductors of electricity.

Certain fruits can change gelatinâs ability to set. In this experiment, kids will discover what happens when gelatin meets pineapple enzyme.

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

This science fair project examines how seeds hitchhike on animals and clothing.

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

This science fair project idea determines what household items are good conductors of electricity.

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.