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In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

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

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

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

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

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

This science fair project idea explores how length affects the weight a bridge can hold.

How powerful is the reaction between baking soda and vinegar? Find out here!

This science fair project explores how osmotic pressure forces water through the root up into the plant.

This science fair project examines how seeds hitchhike on animals and clothing.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

In this plastic wrap science fair project, you'll learn about polymer permeability and find out which plastic wrap keeps food from dehydrating best.

Will increasing the amount of salt in water effect how slow or fast the water freezes?

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

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

Cleaning can be a chore, but not with this sudsy experiment!

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

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

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

This science fair project idea investigates if fats add to the flavor of food.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

Is it magic? No...it's the amazing, gravity-defying capillary action experiment! Kids will love this dramatic and enlightening science fair project.