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This science project teaches students about organic farming and the benefits and disadvantages of commercial plant food.

Explore how sound waves are reflected and absorbed by producing echoes. Analyze which locations produce echoes.

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

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

Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.

Get down to the rubber with this science project that tests the effectiveness of different types of erasers.

Discover that the absorbency of fabrics depend largely on the shape and structure of the individual fibers that make up the fabric.

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

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

This science fair project idea explores how much force is needed to move a lever at different distances from the fulcrum.

Get this cool science fair idea to explore how arctic tundra animals change their behavior and adapt to survive in long, cold winters.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

This science project explores the concept of being opaque or clear. Can you make something clear opaque? Or something opaque clear?

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

This science fair project idea investigates if webbed feet help a duck (and others) swim.

This science fair project idea investigates how the shape of an object affects drag.

This science project allows students to study the psychology of happiness.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.

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

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!

This science fair project idea determines the most effective method of preserving food.

Word color association is just a fancy way to talk about the way we connect colors with words.

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

Soil and energy don't go together, right? That would be as bizarre as a pairing of peanut butter and marshmallows! Well, actually...

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.