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

Determine if certain colors of light are more effective for photosynthesis. Plant seeds in cardboard boxes with different light, record visible growth.

Construct a model of radioactive decay. Learn more about radioactive decay by modeling the process using coin flips.

Do thick liquids flow faster than thin liquids? Examine water and syrup's viscosity and inertia to learn about the Reynolds Number, laminar and turbulent flow.

Science fair project that compares the relative carbon dioxide concentrations of various gases, including different types of vehicle emissions.

Create safe lightning for kids! They'll learn how to make lightning at home with this fun science fair project idea illustrating static charges and grounding.

How is NASA able to launch something into orbit around the Earth? Learn about the relationship between gravity, speed, and orbit in space in this cool project!

Slime: It's oozy, it's goopy, and it's just plain fun! Learn how to make slime with this fun science fair project.

Determine how different measurements of the same object might yield different values. Provide as many reasons that you can think of.

Enter the buzz worthy world of bee watching and find out what time bees like to wake up!

The objective of this science fair project is to examine the effects of temperature on salt and water solutions, as they form crystals over time.

Discover flight initiation distance as you play around in the park with this fun bird watching project!

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

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

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!

In this physics project, you'll learn how to find the maximum height of a projectile using some math and trigonometry.

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.

Learn about calorimetry, make a bomb calorimeter, and experiment with combusting different nuts to see which one produces the most energy!

What's the difference between centripetal and centrifugal force? Students find out by seeing both in action as they conduct this experiment.

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

How good are humans at sound localization? Kids can try this cool science fair project idea to see how good their friends are at judging sound direction.

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

What does a raindrop look like when it splashes on the ground? Is each raindrop unique like snowflakes? Find out how raindrop size varies in this experiment.

Young physicists learn about apparent weightlessnessâthat weird sensation you sometimes feel in elevators, turbulent airplanes, and roller coasters.

Students will investigate the illumination durations and intensities of different luminous substances of different colors of the spectrum.

Melt the ice, but save the lawn. The objective of this science fair project is to explore the effects of different substances on melting ice.

The purpose of this science project is to investigate which will grow larger plants: compost, soil and Miracle - Gro, a mixture of both.

Determine whether the application of Febreeze will lower the bacterial count.

This project is about after-images and what possibly affects them.

Kids build a rainforest food web to explore trophic levels in this cool science fair project for 4th grade.