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

Discover whether cold or hot water from the faucet will boil faster on the stove.

This fun and easy middle school science fair project idea explores the topic of pollution and demonstrates if polluted soil affect the growth of green plants.

Test whether plants can grow without sunlight and water.

This science fair project idea examines which type of insulation holds in the most heat.

Science fair project that compares the biodiversity of fungi in different ecosystems by identifying species of fungi.

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.

Science fair project that helps you better understand density by comparing the relative densities of cans of Coke and Diet Coke.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

In this science fair project, students create their own miniature salt flats at home.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

Find out whether packaged seeds actually do expire in this new science fair project idea.

Wonder why bugs always fly around your lights at night? This experiment determines whether insects are attracted to the heat or the light.

Kids learn about potential energy, and mechanical energy, and how to make power from water with one of our favorite renewable energy projects for kids.

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

This science fair project idea determines if the color of light affects the growth of plants.

This science fair project idea explores plant growth from a bulb, root, and a stem and investigates asexual plant reproduction.

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

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

What are the effects of colored light on plant growth? Explore plant behavior in this cool botany science fair project and learn about phototropism!

How do the phases of the Moon and gravity cause spring tides and neap tides? Does the Sun play a role in the tides? Figure it out in this fun science project!

Kids make a paperclip perform an act of magnetic levitation and test how effective various materials are at magnetic shielding in this science fair project.

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

Find out whether a longer airplane will fly farther or a wider paper airplane.

This science fair project idea explores whether people have an innate feel for the passing of time from a few seconds to 20 minutes.

Would your dog prefer homemade or store-bought food? Raw or cooked? Test your dog's preferred diet in this fun experiment.