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.

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

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

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.

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

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

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

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

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.

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

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

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

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

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

How well can people recall what they have observed. Test your knowledge in this fun experiment.

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

Test whether plants can grow without sunlight and water.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

Determine whether butterflies like to drink sugar water, salt water, or plain water.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

The project determines which type of birds prefer which type of birdseed.