How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

Here is a hands-on activity to help third graders understand the four points of a compass...and how we use them to get around.

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

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

Does the temperature of a magnet affect its strength? Learn about the relationship between magnets and temperature with this cool physics science fair project.

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.

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

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

Many ancient cultures used the rising or setting sun to create calendars. Observe the setting sun once a week to come up with your own solar calendar!

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

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

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

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

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

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

The goal of this project is to create an exciting topographical map out of dough.