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.

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.

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.

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.

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

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.

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!

Handedness and footedness refer to whether people prefer to use their left or right hand and foot. In this experiment, test hand and foot dominance.

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.

This science fair project idea investigates how the shape of an object affects drag.

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.

This science fair project idea demonstrates how air resistance contributes to denser objects falling faster than less dense objects.

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

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

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.

The objective of this science fair project is to explore the relationship between acidic and basic compounds.

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

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!