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.

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

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

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

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.

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.

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.

This is a quick, easy science fair project that conveys the idea of density to upper elementary students.

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

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

In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

Unlike other seed sprouting projects, this one allows kids to compare five different sprouts (either 5 herbs or 5 flowers) by watching them grow in a glove.

Get your hands on a concoction that breaks the rules about what's a solid and what's a liquid.

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

In this project, a model of a submarine is built to simulate the buoyancy and displacement of water and air.

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

Your child will learn science and make a fun new malleable toy with this balloon sandbag science experiment.

Introduce your child to the amazing, almost magical phenomenon of static electricity!

This science fair project idea investigates which objects float and sink in honey, water, and oil.

This science fair project idea researches the different layers of the atmosphere and creates a visual representation of the atmospheric layers.