Make your own helicopter using a paper clip and a sheet of paper. Hold the spinner up in the air, let it go, and watch it spin gracefully to the ground.

This fun marbled paper craft uses things you're likely to have around your house, and it teaches kids some simple chemistry too!

Learn how to make marbleized paper with simple everyday ingredients in this fun activity! Your child will learn about oil and water while doing this project.

Turn the common pastime of constructing paper airplanes into a lesson on the physics of aerodynamics and flight with this fun science activity.

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.

Take this "paper plate snack test" with your child for a hands-on lesson in making healthier choices to teach your child about what's in his food.

Here's a fun at-home activity that will help your child strengthen math skills using high and low temperature data, and become a master temperature tracker!

Introduce your second grader to the crazy world of static electricity with just a balloon and a sheet of paper.

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

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

All you need are pencils, paper and some scissors to get started on this easy and fun game to review astronomy information, or other types of study concepts.

Your child will do a fun science experiment using soap and pepper flakes to help understand the concepts of water molecules and the surface tension of water.

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

This science fair project idea produces varying pitches of sound.

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

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.

Take advantage of the fact that ink and water don't mix and introduce your kid to suminagashi, a Japanese form of art.

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.

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

In this science experiment, your child will test the strength of hollow structures in order to understand how strong bird bones really are.

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

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

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.

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

Engineers in training can get started with this simple wheel-and-axle construction activity.

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.

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

Hone your child's skills of observation and take a look at forensic science for an interesting afternoon of exploration and detective work!

Help your child understand surface tension by showing them how they can create a "skin" on top of water.