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The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

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

Let your fourth grade chef mix up butter and sugar with scientific principles about different states of matter, and get delicious toffee, too.

This science fair project idea discovers whether there are some objects that do not fall at a constant rate.

This science fair project idea examines whether boys and girls differ in reflexes.

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

In this science fair project, students make their own rain gauge to measure rainfall.

This science fair project idea examines whether the colors of the spectrum respond differently in the thermal aspect when radiated by the sun.

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

Have your child build his own mini waterfall, and help him develop his planning, problem solving, and architectural skills.

This simple "how to make a water wheel" activity makes physics come alive for your child by demonstrating how different kinds of energy work.

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

This science fair project idea explores whether it is easier to balance on a narrow ledge or on a rope.

Looking for a fun summer adventure? Learn what it was like to be a prospector during the California Gold Rush by panning for gold in a local creek.

Celebrate autumn with a seasonal bash. Welcome the fall with a festive party for your little one and her friends, full of crafts, snacks and fun games.

This science fair project idea examines the reason boats are shaped and engineered.

This science fair idea examines hydrogel superabsorbent polymer crystals. They can absorb 500 times their weight in water. Can they absorb other liquids too?

The rock cycle will come alive for your child when he uses broken crayons to create the three basic rock types.

In this activity your child will create their very own marble maze!

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

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

What does a raindrop look like when it splashes on the ground? Is each raindrop unique like snowflakes? Find out how raindrop size varies in this experiment.

In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.