This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

This light bulb science project includes step-by-step instructions for testing the heat from different light bulbs.

How good are humans at sound localization? Kids can try this cool science fair project idea to see how good their friends are at judging sound direction.

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

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

This science fair project idea explores whether white light can be separated into different colors.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

Learn about sound physics and do a survey experiment to explore the difference between sound and noise in this science project.

Plants and light seem to be good buddies, but how far does the friendship really go?

This science fair project idea discovers if an artificial light source will yield the same plant health and growth rates as light from the sun.

Learn about where colors come from and how light absorption works in this fun experiment! All you need is a flashlight, construction paper, and cellophane!

Do earthworms like moisture or darkness? Find out as we explore the relationship between earthworms and light.

Wonder why bugs always fly around your lights at night? This experiment determines whether insects are attracted to the heat or the light.

This science fair project idea determines if the color of light affects the growth of plants.

This science fair project idea produces varying pitches of sound.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

Learn about the effect of artificial light on plant growth versus natural sunlight and delve into some biology and botany concepts in this science project.

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?

The objective of this science fair project idea is to examine light refraction as it passes through liquid crystals.

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

Explore how sound waves are reflected and absorbed by producing echoes. Analyze which locations produce echoes.

Check out this cool science fair project idea to explore which other common animals besides scorpions glow under a UV Black light.

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

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

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

In this science fair project, students focus sunlight with a magnifying glass and trap shorter waves to melt ice.

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.

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.

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!