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

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

The project investigates how friction affects motion by using different surface textures.

In this project, waves of vibrations are experimented with using water in glasses.

In this project students experiment with making music using only glasses of water.

In this science fair project you will make a model of a cell membrane using very simple material.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

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

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

Demonstrate the properties of pressure and surface tension to explain how water can stay inside an upside down glass using cardboard.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

Gymnosperms are coniferous trees that reproduces using pine cones to spread seeds. Check out this simple pine cone experiment to learn about the process!

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

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

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

In this science project, the center of gravity is explored.

This science fair project idea investigates the hardness property of minerals.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

This science fair project idea investigates if webbed feet help a duck (and others) swim.

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

Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

Science fair project that examines condensation and the conditions needed in order for dew to form.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

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

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.