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.

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

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

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.

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.

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

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

This science fair project enhances the understanding and awareness of energy use and explores the concept of energy efficient.

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.