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

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.

Start your toy engines -- this is going to be a fast and friction-filled race!

Got a birdwatcher on your hands? Bring the birds to your backyard by making a zany bird feeder using an orange and some string.

Create your own cloud with an activity that will explain how important concepts such as evaporation, condensation, and precipitation work.

This project examines what types of objects burn and which burn faster and cleaner.

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this 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.

This science fair project idea explores whether color affects a person's emotional state.

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

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

Introduce your second grader to the crazy world of static electricity with just a balloon and a sheet of paper.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.

This science fair project idea recreates the movement of planetary bodies in order to learn why they sometimes appear to move backwards.

Amaze your kids by separating a salt and pepper mixture using an "electric spoon" charged with wool.

Science fair project which evaluates different athletic shoes in order to find out whether any of them affect a person's ability to run.

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.