What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

Show your fifth grade scientist how to create a siphon using two buckets, plastic tubing, and water. Watch her astonishment as the water travels uphill!

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.

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

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

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

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

Help your child get a grasp on what it was like to build gigantic ancient structures with this easy engineering activity about science and physics.

Has your kid noticed how much bigger the moon looks when it's low in the sky? Here's an activity you can do to show them that it's just an optical illusion.

Introduce your child to science with something they see everyday--their shadow!

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.

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

Here's an investigative activity in which your child will discover real-world names and uses for sugar and find out how it is hidden in many different foods.

Your third grader will delight in learning about sound waves as he observes the different sounds created by tapping on glasses with varying amounts of water.

This science fair project idea produces varying pitches of sound.

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.

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

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

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

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

Future whistleblowers can learn about product safety standards with this exercise in writing and researching.

This 4th of July, explore fourth grade science and make some safe fireworks in your own backyard using soda pop!

Explore concepts in current and coltage with these Van de Graaff generator experiments.