In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

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

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

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

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

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

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

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.

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

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

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

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

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

This science fair project idea determines the most effective method of preserving food.

This science fair project idea determines if the color of light affects the growth of plants.

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?

This science project encourages students to investigate the Mozart Effect, the idea that classical music promotes learning.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

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

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

This science fair project idea investigates whether air has mass and weight.

Explore how sound waves are reflected and absorbed by producing echoes. Analyze which locations produce echoes.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

Learn whether writing things down really makes things easier to remember.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

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