Inspire your child to put on her engineer hat for the day, as she builds her very own, double-decker bridge.

The purpose of this science fair project is to build a basic radio.

This science fair project idea produces varying pitches of sound.

This science fair project demonstrates the principles of reflection through simple experiments involving mirrors and light.

This science fair project idea demonstrates sonar mapping of the ocean floor.

This science fair project idea experiments with spinning color wheels and optical illusions.

In this science fair experiment, students learn about the scientific principles behind Doppler ultrasound.

This science fair project idea produces sounds by creating vibrations using different objects.

This science fair project idea studies how talking on a cell phone affect driving?

This science fair project idea explores whether talking to a plant will help it grow.

This science fair project idea shows how a vibrating object transfers energy to whatever it touches.

In this science fair project, young children discover what happens when two fluids that have different densities get together.

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

The goal of this science fair project is to assess the acidity levels of common food and household products using pH test strips.

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.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

What is the Doppler Effect, or the Doppler Shift? The purpose of this science fair project is to determine how distance impacts the Doppler Effect.

Check out this fun science fair project idea to learn about seismic waves and how fast they travel during an earthquake.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

Students pit the heat capacity of water against the heat capacity of oil while looking at the effects of dipole rotation in this cool science fair project idea.

In this fun science fair project idea learn the difference between additive and subtractive color and why they are handled differently.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

In this fun science fair project idea learn about the multiple sources of radio waves and fin out how difficult it is to block them.

Science fair project that examines what causes thunder and why a thunderclap sounds so loud. How is lightening related to the creation of sound waves?

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

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

Get a cool and easy science fair project idea which helps high school students in understanding concepts behind the working of a microphone.

In this cool science fair project, kids apply basic algebra to learn how to make a PVC pipe instrument while exploring concepts like frequency and resonance.

How fast does light travel in different mediums? Kids conduct a cool refraction experiment in materials like water and air for this science fair project.

Little scientists will make inferences about hearing loss, pitch, and frequency in this great science fair idea that puts the human ear to the test.