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

Here's a simple craft activity that can help your youngster better visualize the life cycle of a frog as a circle.

This project will explore whether test subjects, deprived of points of reference, will, in attempting to walk a straight course, walk in circles.

Science fair project which will teach you more about the foods that you eat, and learn which ones are healthier choices.

This science fair project aims to examine the nature of pi and analyze other properties and values related to circles, such as radius, diameter

In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

Who says snow globes are just for winter? Help your child create a summer version with this fun art project!

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

Put an oatmeal box, a flashlight, and some construction paper together and you have the makings of an incredibly cool bedroom planetarium!

Help young learners discover why catÃs eyes glow in the dark with this simple experiment

Help your curious third grader construct a dazzling spinning wheel that will teach him about the science behind colors while providing some silly entertainment!

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

Have your child try this classic experiment that demonstrates circular motion using a bucket and rope. Be careful, you might get soaked!

Check out this cool science fair project idea on spectrum spinners and investigate how certain color combination can produce other colors.

Build an electroscope, a simple device that measures static electricity, or the freely flowing electrical charges of the atmosphere!

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!

Science fair project that tests the effects of diluted soap on the size of bubbles blown from the solution. Will dilution cause smaller bubbles?

Your child can create his own texture tree, experimenting with design during the process. The result will be a beautiful addition to your holiday decorations

This simple activity is not only fun, it's also a useful way to organize children's closets — and offer kids some autonomy to boot.

Your preschooler will engage their senses by making a scented pumpkin to decorate your house.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

Ignite your kindergartener's love of adventure and learning with an imaginary trip under the sea.

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

Your fourth grader will be astonished to discover the significance and intricacies of his spine as he builds a model of a human vertebral column.

Take to the air with science by experimenting with helicopter seeds right in your own backyard!

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

How good are humans at sound localization? Kids can try this cool science fair project idea to see how good their friends are at judging sound direction.