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.

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.

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

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!

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.

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.

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

Explore how you can achieve magnetic levitation with the Meissner Effect! This cool science project explains formation and applications of a superconductor.

The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.

Find out whether we can create motion in a dish and as a result, create a wonderful and colorful show.

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

Set off an a science adventure as you prepare a row of bee homes for your new visitors.

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.

The goal of this science fair project is to evaluate the effect of heat on sound wave frequency.

Check out this cool science fair idea on why hard fruits become soft and learn how to compare the sugar content between ripe and unripe fruits.