This science fair project idea compares biodiversity between drops of water.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

Science fair project that demonstrates the effect of detergent pollution on fresh water birds' ability to stay afloat.

Test your friends to find out if you can replicate the placebo effect's incredible results.

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

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.

Is it magic? No...it's the amazing, gravity-defying capillary action experiment! Kids will love this dramatic and enlightening science fair project.

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.

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

Did you know a mouse eats almost fifty times as much as a cow? Find out how and test out the strange science with your friends!

In this plastic wrap science fair project, you'll learn about polymer permeability and find out which plastic wrap keeps food from dehydrating best.

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!

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

This science fair project idea investigates how color affects temperature.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

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

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

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

In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

This science fair project idea investigates the hardness property of minerals.

Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?

This science experiment has students test whether a snail moves faster on concrete or dirt.