Science fair project which will teach you more about the foods that you eat, and learn which ones are healthier choices.

In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

This science fair project idea creates cool new colorful fabric pattern designs and experiments with the mixing of colors.

Your fourth grader will be astonished to discover the significance and intricacies of his spine as he builds a model of a human vertebral column.

This science fair project idea experiments with spinning color wheels and optical illusions.

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 idea recreates the movement of planetary bodies in order to learn why they sometimes appear to move backwards.

Why do ants like sugar? Do ants like artificial sweeteners too? Kids find out with this great inquiry-based science fair project.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

An home science experiment for older students that teaches about the science behind heat.

Tree rings can tell the age of the tree but also information about the world. This science experiment uses tree stumps to discover new facts.

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

How do the phases of the Moon and gravity cause spring tides and neap tides? Does the Sun play a role in the tides? Figure it out in this fun science project!

This is a quick, easy science fair project that conveys the idea of density to upper elementary students.

Science fair project which teaches you about the principles of physics within a vacuum by creating a vacuum chamber.

Would your child like to learn about a hidden world? All she needs to do is open her box of markers!

Here's a fun activity that will introduce your fourth grader to the concept of frictionless motion by constructing a hovercraft.

This science fair project explains the process of how the lungs expand and contract with the help of the diaphragm.

Pair a planetarium visit with this fun art project that mimics the look of far-off galaxies.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

Deck the halls with last season's Christmas lights for a spectacular and electrifying science activity.

Grow borax crystals and get your child excited about Earth science with this crafty science experiment.

Want to help make studying the nervous system a little more fun? This thinking cap is a great way to learn external human brain anatomy.