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.

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

This easy and inexpensive paper towel science project introduces kids to important physical concepts like cohesion, adhesion, and capillarity.

This project compares the strength of one, two, and three-ply toilet paper.

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

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

The objective this science fair project is to determine whether a bigger bag will allow a homemade hot air balloon to fly higher than smaller bag.

Find out whether a longer airplane will fly farther or a wider paper airplane.

This experiment explores whether reading text on a computer screen or type on paper leads to better retention of the information read.

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

In this activity, your child will be challenged to make a tower using paper cups.

This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

Learn about where colors come from and how light absorption works in this fun experiment! All you need is a flashlight, construction paper, and cellophane!

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

Explore the craters, maria, and highlands on the surface of the Moon! In this fun science project you'll create a 3-D model of the moon using paper mache.

In this fun science experiment, kids will determine the best method for ripening avocados and discover the cool chemical reaction that makes this possible.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

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

This project investigates the affect of storage temperature on microwave popcorn.

This science fair project idea demonstrates that plants give off water.

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

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

This science fair project examines which fruits and/or vegetables will ripen prematurely when placed with ripe apples.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

Do hand soaps and sanitizers prevent the growth of bread mold? If so, why? Kids will find out with this fun and informative science fair project idea.