Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

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

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 determines if the size of the parachute will change the rate at which an object falls.

Get down to the rubber with this science project that tests the effectiveness of different types of erasers.

Using a toy race car kids create a visual model of the Doppler Effect.

In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.

This science fair project idea explores how length affects the weight a bridge can hold.

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

This science fair project idea investigates if webbed feet help a duck (and others) swim.

This classic children's game demonstrates how sound travels through air vs. through a solid.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

This simple heat transfer experiment is a great introduction to the concepts of heat transfer and conduction.

Children have a naturally inquisitive mind. Foster their curiosity with a walk through an autumn field or park to answer age-old “why” questions. As you walk with your child, you can encourage them to ask questions.

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?