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

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

This project determines what percentage of test subjects react adversely to the sound of fingernails on a chalkboard and explores their physiological responses.

Explore the wave-particle duality of light! Learn how light can behave as both a wave and a particle in this cool physics science fair project idea for kids.

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

.Have you ever had problems with your wifi signal strength? In this experiment you will learn about how wireless signals pass through the air and solid objects.

This experiment will explore how mallets of various materials and weight create sonic tones of varying lengths.

This science fair project idea produces varying pitches of sound.

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

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.

Find a mathematical relationship between the intensity of a sound wave and distance from the sound source. Use a pedometer and a sound level meter.

Make stunning pendulum waves and learn the math behind the patterns generated with this cool and easy science project.

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

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.

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

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

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.

Look for a correlation between temperature and the intensity of cricket chirping. Measure ambient temperature and sound intensity in decibels.

This science project examines the history of earthquakes and what we can do to prevent future disasters.

This awesome diffraction grating experiment puts high school students' applied math skills to the test by having them calculate the wavelength of laser light.

Demonstrate how we are able to locate sounds, echolocation. Have a blindfolded subject locate you by the sound of your clapping.

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

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

The objective of this experiment is to identify common materials that absorb sound waves with the greatest efficiency.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

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

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

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.