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.

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.

What heats up fasterâwater or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

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

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

This science fair project idea discovers if an artificial light source will yield the same plant health and growth rates as light from the sun.

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

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 whether plants can survive being frozen.

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

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

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

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

The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.

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

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

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!

What can you do with hair after its cut? This science project teaches you practical uses for human hair.

Demonstrate how to tell the age of an egg without having to crack it open.

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.

This science research project challenges students to think of more effective lobster farming methods.

This science project allows students to study the psychology of happiness.

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

This science project has students study a group of volunteer liars actively lying to study the behavior of a lie. Students see if they can figure out the truth.