This science fair project idea recreates the movement of planetary bodies in order to learn why they sometimes appear to move backwards.

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

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

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

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

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

How do organic materials become soil? This science experiment measures what materials biodegrade.

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

This science fair project idea explores how enzyme inhibitors, active sites, non-competitive enzyme inhibitors, and substrates work.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

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.

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

This science fair project idea examines the distance a person travels on an average day and to relate that to an understanding of the size of the Earth.

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.

This science fair project examines which fruits and/or vegetables will ripen prematurely when placed with ripe apples.

Science fair project that examines how temperature affects density and how density in turn affects the behavior of helium gas.

This science fair project idea determines the probability of a coin landing heads or tails.

This project uses science and art to help students learn and teach others about Earth's endangered and extinct species.

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.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

This science fair project idea explores whether it is easier to balance on a narrow ledge or on a rope.

Cleaning can be a chore, but not with this sudsy experiment!

In this insulation experiment, you'll learn which clothes keep you warm in the cold, and which make you shiver.

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.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

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

Science fair project about work and energy which uses a simple mathematical formula to predict how far a jar will roll down an incline.

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

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.