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

How do we know that air exists when we can't see it, taste it, or touch it? Here's a classic experiment that will teach your kid some basics of aerodynamics!

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

Here's one way to recycle: turn a tuna can into a mini barbecue and teach your child the power of resourcefulness!

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.

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

Experiment with buoyancy to learn how a submarine rises and sinks in this classic science experiment.

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.

What happens when colored beams of light mix? You might be surprised.

This trick uses vertical and horizontal forces to help your child to push apart your hands apart, no matter how hard you try to keep them together!

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

In this challenge, students are tasked with creating a model roller coaster that a marble can travel through.

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

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.

Here's a great activity that uses corks and toothpicks to create a fleet of floating boats. Which design makes for the most seaworthy vessel?

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

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

Science fair project the demonstrates Newton's Third Law using a milk carton filled with water.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

Air invisible; it doesn't make sounds; you can't pick it up and throw it. So how do we know it exists? Help your second grade scientist figure it out.

Teach your little scientist about the amazing powers of gravity by comparing the falling speeds of two yummy fruits

Based on the concept of water's "freezing point," this activity entails the lowering of water's freezing point to chill ice cream!

Learn with makes water molecules work with this fun and easy science activity!

This quick and simple preschool mirror activity will introduce your child to the science of reflection and light with a flashlight experiment and picture game.

Determine the relationship between the speed of a sound and the temperature of the air it passes through.

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

Make a DIY golf putter and design your own golf putting course in this 2nd-3rd grade arts and crafts/game activity.

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

In this cool sound resonance experiment, learn about frequency and pitch, and use a tuning fork to calculate sound velocity in air.

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.