This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

Use pepper and soap to discover some fun facts about the properties of water.

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

Uh-oh! Is that a pill sitting on the counter or a piece of candy?

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

Why does purple cheese look nasty? Because color plays a big part in how we perceive the taste of different foods. Are birds just like us in this respect?

In this insulation experiment, you'll learn which clothes keep you warm in the cold, and which make you shiver.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

Learn how to be a bird scientist in this simple project of watching feathered friends in their habitat.

Check out this fun science fair project idea for 1st grade: a solar eclipse model that demonstrates total, partial, and annular solar eclipses.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

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