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

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.

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 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.

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.

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

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

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

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.

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 investigates how color affects temperature.

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

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

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

In this project, the affects of vitamin E are observed on a rose petal.

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!

This science fair project idea determines if the temperature of rubber effects how high it bounces.

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

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

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

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

Have you ever noticed the ridges on a dog's nose? In this project, we take several dogs' nose prints and discover just how unique they are!

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

This science fair project idea examines liquids of different densities.

This science fair project idea investigates the difference in reaction times between boys and girls.

Test whether plants can grow without sunlight and water.

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.