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.

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

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.

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 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.

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

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.

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

What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

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

In this science project, baking powder and vinegar are used to simulate the action of a fire extinguisher.

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.