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This science fair project idea recreates the movement of planetary bodies in order to learn why they sometimes appear to move backwards.

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

Test your friends to find out if you can replicate the placebo effect's incredible results.

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

This science fair project idea explores alcoholic fermentation at work by making your own soda.

This experiment examines whether storing your orange juice at different temperatures affects its acidity.

How well can people recall what they have observed. Test your knowledge in this fun experiment.

Is it a square or a circle? See if you can trick your friends with this zany science project!

Are you ready to be a detective for science? Then get out your magnifying glass and start studying fingerprints!

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

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

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

Set off an a science adventure as you prepare a row of bee homes for your new visitors.

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

Have you ever wondered how many numbers most people can memorize? Test your friends to find out!

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

Before you get ready for a delicious scramble or omelet, add a bit of science to your morning routine!

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

Kids will learn how to clean fish tank the natural way. Add catfish to the tank and see if your water gets cleaner.

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

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

Wonder why bugs always fly around your lights at night? This experiment determines whether insects are attracted to the heat or the light.

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

Did you know a mouse eats almost fifty times as much as a cow? Find out how and test out the strange science with your friends!

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!