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

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

In this activity, you'll not only make your own bouncy balls at home, but your child will also learn how polymers are made.

Science fair project in which you will attempt to throw a ball the greatest horizontal distance possible by using different angles.

In this activity, your child will transform an egg into a glowing, bouncy "ball" that they can play with.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

The goal of this golf science fair science fair project is to determine whether the temperature of a golf ball affects its elasticity and its rebound.

Find out whether optical mice are useful on all surfaces or if there are drawbacks to this supposedly superior solution to the traditional roller-ball mouse.

In this project, a basketball containing different psi is dropped to see how well it bounces.

This science fair project idea determines if the temperature of rubber effects how high it bounces.

In this activity, your child will learn about a style of gardening that uses moss, also called "kokedama."

We all know that the Moon has different phases, but it can be hard to figure out why. Try this activity to see how the Moon's phases really work.

Want to see a great example of Newton's first law? Kids will learn about basic physics with this fun, ballistic experiment.

This basketball project explores the best way to make the perfect shot every time.

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.

Wondering how we know that air is there? Here's a quick and easy experiment that proves that air may be thin, but it's not too wimpy to block your shot!

Your kid will delight in creating an extraterrestrial vehicle from goods found around the house. There's no telling where her imagination will go!

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

This cool and easy elementary school science fair project idea provides the basic information on the use of our senses to experience the world about us.

Teach your little scientist about the amazing powers of gravity by comparing the falling speeds of two yummy fruits

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

Turn an abstract lesson into a practical craft with the fun and colorful creation of dough earth layers!

In this science fair project, students learn how pressure can make the minerals in a rock line up in the same direction and form bands and foliation.

This educated-guessing game is great for preschoolers. This activity helps your child work on her reasoning skills.

This science fair project idea measures the growth of bread dough and finds out how long it takes for the dough to stop rising.

What's a crater, and how does it happen? Here's a kindergarten experiment with safe, nontoxic ingredients.

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

In this experiment, students will discover how heat and pressure turn clay into slate, phyllite, and finally schist.

Make a seed bomb and let your junior guerilla gardener spread flowers far and wide.

Encourage your child to think outside the bathtub by making her very own handmade soaps! Perfect as a present, a decoration, or just to pamper herself.