This science fair project idea determines which method of hand cleansing is the most effective.

This science fair project idea determines what household items are good conductors of electricity.

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.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

This science fair project idea determines what household items are good conductors of electricity.

This science fair project idea examines whether the colors of the spectrum respond differently in the thermal aspect when radiated by the sun.

This science fair project idea experiments with spinning color wheels and optical illusions.

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

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

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

A homemade lava lamp gives any room a retro flair. Find out how to make a homemade lava lamp, and learn some science too, with this educational activity.

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

This project examines if computer screen and text color affect retention and if people subconsciously prefer combinations of colors that help their retention.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

Help your fifth grader execute this experiment involving a lit candle (submerged in water!) to show him the wonders of heat energy transference.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

Excite your fourth grader by recreating ancient Viking myths. This miniature longboat will explore the principle of water molecules expanding when heated.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

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

Have your child build a model of a coral polyp, one of the tiny animals that composes a coral reef.