In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

This science fair project idea produces varying pitches of sound.

Here's an interesting activity that will enable your child to make his own magnifier out of a drop of water

Science isn't ho hum anymore when it involves building catapults to teach your fifth grader about projectile motion.

This science fair project tested various nose cones to determine which would be the most ideal shape for propelling a water rocket.

Are you ready to pilot your own airplane? Well, then take to the skies with this high-flying project!

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

Science fair project that demonstrates how stalagmites and stalactites are formed.

This project can help prepare your child for a trip to the tide pools, or give him a way to remember some of the many creatures he saw during his visit.

The goal of this project is to create an exciting topographical map out of dough.

Help your child create a magical miniature garden in the most unlikely of places: a recycled plastic bottle!

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

Have your child build a model of a coral polyp, one of the tiny animals that composes a coral reef.

Science fair project which determines which colors of light allow plants to produce the most chlorophyll. How are color and light related to each other?

This science fair project idea explores plant growth from a bulb, root, and a stem and investigates asexual plant reproduction.

Science fair project that creates fog using bottles of hot and cold water.

Science fair project in which you will graft branches from different fruit tree onto a root stalk.

This science fair project idea explores how water and ice can change the form of rocks.

Determine which material produces the strongest static charge.

Young physicists will wrestle with a discrepant event: the Hammer Ruler Trick. They'll make some inferences about torque, balance, and center of gravity.

This cool air pressure demonstration has kids break a ruler using only a newspaper and atmospheric pressure.

The rock cycle will come alive for your child when he uses broken crayons to create the three basic rock types.

This project explores the interaction between air pressure and playing surface in determining a basketballâs bounce.

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

Science fair project that demonstrates the different phases of the moon by physically representing them with construction paper and a shoebox

In this experiment, you'll make a seafloor spreading model to learn more about how plate tectonics work and create mid-ocean ridges.

Delight your budding scientist with this cool physics magic trick and teach her some basic physics concepts while you're at it!

Deck the halls with last season's Christmas lights for a spectacular and electrifying science activity.

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.