Children will learn why and how to compost as they help with the process of filling their compost, turning it, and observing the changes that occur.

The objective of this science project is to determine the relationship between carbon dioxide gas and the temperature of the atmosphere.

This science fair project idea investigates whether rocks containing geodes can be determined from the outside.

Learn how to make a weathervane with this fun and simple meteorology project for fourth graders.

Here's a simple science activity that will help your child better understand how wells bring us water.

Do heavier objects fall faster than lighter ones? Students learn the answer by watching the effect gravity in a vacuum has on a coin and a feather.

This project involves the programming and development of a 3D Rubik's Cube application using C++.

How do organic materials become soil? This science experiment measures what materials biodegrade.

Learn about the greenhouse effect- and get great science fair experiment ideas. Read more.

Recreate the fantastic phenomena of solar eclipses with your child using just a flashlight, a quarter, and her very own face!

This science fair project idea explores what it takes to create a biosphere, or a self-sustaining ecosystem.

The Galileo inclined plane physics experiment was one of the first ways scientists calculated acceleration due to gravity. Do it yourself in this project!

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.

Develop a new system for predicting geographic changes. Demonstrate the nature of geographic change. Make logical predictions.

In this experiment you explore how tectonic plates move to create land and expand bodies of water.

This study evaluates if electronic devices commonly found in most households emit radiation, and if they do, how much?

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

In this experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

Try this simple 2nd grade science experiment to teach your child about the principles of luminosity and light reflection.

Explore the craters, maria, and highlands on the surface of the Moon! In this fun science project you'll create a 3-D model of the moon using paper mache.

In this experiment, you'll make a seafloor spreading model to learn more about how plate tectonics work and create mid-ocean ridges.

Teach your child about recycling and gardening as she re-uses an empty plastic milk gallon jug to craft a swan-shaped plant container!

Your child helps the environment while saving your family money in this fun and rewarding "Gas Guzzlers" competition.

Check out this free high school science fair project to explore the physics of the Coriolis effect with a homemade Foucault Pendulum.

Try this activity with your child to explore what happens to rain (and the living things that need it) when it becomes polluted.

This experiment will explore the possibility of creating an infinite object by hand.

Study how we perceive color by exploring optical illusions such as pointillism, digital images, and Ishihara tests.

The objective of this free science fair project is to examine the way in which the phases of the moon affect circadian patterns in mammals.

Have your child try this classic experiment that demonstrates circular motion using a bucket and rope. Be careful, you might get soaked!

In this activity, children will let their imagination run wild as they design and build a new planet in the solar system.