This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

Examine the effect of pressure on carbonation in soda.

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

This experiment explores whether reading text on a computer screen or type on paper leads to better retention of the information read.

Challenge your learner to design and build a city of their own in this creative engineering activity.

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

In this project, vinegar and salt act as preservatives keeping bacteria from growing in the bouillon mixtures.

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.

This science fair idea examines hydrogel superabsorbent polymer crystals. They can absorb 500 times their weight in water. Can they absorb other liquids too?

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

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

This science fair project focuses on a polymer called hydrogel super absorbent crystal which absorbs water, swelling to many times its original size.