Is it a square or a circle? See if you can trick your friends with this zany science project!

Cinnamon is tasty, but does it have super powers as well? Find out if cinnamon can repel mosquitoes in this outdoorsy experiment.

Check out this fun science fair project idea for 1st grade: a solar eclipse model that demonstrates total, partial, and annular solar eclipses.

This science fair project idea demonstrates how air resistance contributes to denser objects falling faster than less dense objects.

This science fair project idea explores whether people have an innate feel for the passing of time from a few seconds to 20 minutes.

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

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

Does electricity move better through thick wires or thin ones? kids will conduct this classic electricity experiment for this science fair project.

In this experiment, young ecologists will learn about a type of edge effect: how trees and plants at the edge of a forest can act as a weed filter.

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

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

In this fun project, use a memory game to test various age groups and determine whether aging directly affects short-term memory loss.

Find out whether a longer airplane will fly farther or a wider paper airplane.

This science fair project idea teaches that time always passes at the same rate and nothing we do in our daily life âreallyâ affects how fast it moves.

Use pepper and soap to discover some fun facts about the properties of water.

Science fair project which determines whether it is numerically possible to be connected to every person on the earth within six degrees of separation.

Can you dig it? This science experiment isn't for kids who like to keep their hands clean.

Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

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.

Young physicists will wrestle with a discrepant event: the Hammer Ruler Trick. They'll make some inferences about torque, balance, and center of gravity.

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

In this CD hovercraft science project, students will construct their own DIY hovercraft.

Have you ever noticed the way a dropped stone makes a fun pattern in a pond or lake? What's the science behind these splashy occurrences?

Why does purple cheese look nasty? Because color plays a big part in how we perceive the taste of different foods. Are birds just like us in this respect?

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

Find out whether optical mice are useful on all surfaces or if there are drawbacks to this supposedly superior solution to the traditional roller-ball mouse.

How powerful is the reaction between baking soda and vinegar? Find out here!

Here's an easy experiment that lets your first grader practice the scientific method, while watching a caterpillar eat.

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.