In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

How would you dry your wet clothes if your dryer didn't work? Find out with this fun experiment!

In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

Before you get ready for a delicious scramble or omelet, add a bit of science to your morning routine!

In this simple circular motion experiment, you'll observe tangential velocity and learn about how acceleration and centripetal force affect an object.

Take a dive into the candy jar with this yummy science experiment.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

This cool and easy elementary school science fair project idea provides the basic information on the use of our senses to experience the world about us.

Will storing cucumbers and tomatoes in the fridge destroy their unique flavors? Find out in this science fair project idea!

This science fair project idea produces varying pitches of sound.

Have your kid determine if a goldfish can be conditioned to expect food the same way Pavlov's dogs did with this fascinating science fair project.

This science fair project idea explores the egg's thin membrane.

In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

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 does salinity affect the point at which water freezes? Kids will find out by performing this cool melting ice experiment.

This science fair project idea investigates how magnetism can defy the force of gravity.

This science fair project idea investigates how color affects temperature.

Discover how and which salt melts ice the quickest.

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.

This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.

This science fair project idea explores whether cats can be trained in the same way that dogs can.

This is a quick, easy science fair project that conveys the idea of density to preschool and early elementary children.

This science fair project explores how osmotic pressure forces water through the root up into the plant.

This science fair project idea discovers if an artificial light source will yield the same plant health and growth rates as light from the sun.

The objective of this science fair project idea is to examine light refraction as it passes through liquid crystals.

In this science fair project, students focus sunlight with a magnifying glass and trap shorter waves to melt ice.

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

This science fair project idea explores whether a plastic slinky works as well as a metal slinky when walking it down the stairs.