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

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

In this project students experiment with making music using only glasses of water.

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.

In this project children practice the scientific method while playing with puffy paint.

In this exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

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

In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.

Do you think heat can affect a plant's growth rate?

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

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.

Plants and light seem to be good buddies, but how far does the friendship really go?

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

Explore scientific concepts with this experiment that introduces kids to the scientific method!

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!

This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

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

Do hand soaps and sanitizers prevent the growth of bread mold? If so, why? Kids will find out with this fun and informative science fair project idea.

In this design challenge, your child will create a parachute for a small toy using typical household items.

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 project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

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.

This project investigates the affect of storage temperature on microwave popcorn.