In this science fair project, we'll explore how blocking the sun's light can stop those can stop photosensitive paper from changing color.

Have you ever noticed the ridges on a dog's nose? In this project, we take several dogs' nose prints and discover just how unique they are!

Show your preschooler how to make a print of a butterfly using her hand as a tool--a great way to stimulate her sense of touch.

In this science project, young children observe, record, and create collections of colors in their world and increase their powers of observation.

In this science fair project, young children observe, record, and create collections of shapes in their world and increase their powers of observation.

Dinosaurs were huge creatures that left behind huge footprints that lasted for millions of years. In this science fair project, kids learn how dinosaur tracks were left behind!

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

This science fair project teaches students the differences between fruits and vegetables.

This science project challenges students to learn about and classify weeds and discover new practical uses for weeds.

This science project teaches students to classify different shapes of leaves.

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

Could there be toxic chemicals lurking in the cupboards and closets of your home?

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

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

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

This recipe makes bubbles that not only blow up nice and big, but do tricks and experiments! How do you do it? It's not a secret, it's science!

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

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

Learn how different types of soil affect how animal tracks form in this experiment!

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

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.

How well can people recall what they have observed. Test your knowledge in this fun experiment.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.