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

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

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.

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.

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

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

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

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.

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

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

Find out whether putting something on top of a plant will inhibit its growth.

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

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

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.

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

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

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

Test whether plants can grow without sunlight and water.

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

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

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

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

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

This science fair project uses paper chromatography to investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.

Magnets vary in strength. Have your young scientist figure out which kind of magnet is the strongest when you have him conduct this attractive experiment.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

This science fair project idea investigates how color affects temperature.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.