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

Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.

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

Learn how to make an anemometer with step-by-step instructions in this cool 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.

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.

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

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

This science fair project idea investigates whether plants can survive being frozen.

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 idea determines if the color of light affects the growth of plants.

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

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

This project examines whether playing music during class helps students learn or if it distracts students from learning.

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

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

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

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

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!

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

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

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?

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

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

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

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

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 explores whether the process used to dry the beans we eat for food renders them unviable.

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