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In this enlightening transpiration experiment, kids will explore how the loss of water from plants through transpiration contributes to the water cycle.

This science experiment has students test whether a snail moves faster on concrete or dirt.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

This science fair project idea explores how enzyme inhibitors, active sites, non-competitive enzyme inhibitors, and substrates work.

This project determines what category of person is most likely to be ticklish.

The purpose of this study is to determine if people can tell the difference between organic and conventional food from looking at, smelling and tasting it.

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

The objective of this science fair project is to explore the relationship between acidic and basic compounds.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

Marshmallows are made of sugar, water, and air pockets. Since the marshmallow is flexible, will air pressure cause it to expand when heated in a microwave?

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.

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!

This science fair project idea examines which type of insulation holds in the most heat.

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

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

In this design thinking activity, your child will choose an animal to research, learn about the animal’s habitat, and then replicate the animal's habitat using household items.

The goal of this golf science fair science fair project is to determine whether the temperature of a golf ball affects its elasticity and its rebound.

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

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

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

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

Enter the buzz worthy world of bee watching and find out what time bees like to wake up!

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.