This science fair project idea determines which method of hand cleansing is the most effective.

This science fair project idea explores alcoholic fermentation at work by making your own soda.

What is mulch? Kids will provide soil with a wet blanket of mulch and see if that helps keep drought-stricken soil damp.

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

This science fair project idea explores whether it is easier to balance on a narrow ledge or on a rope.

In this fun activity, your child will create their very own solar oven to bake s'mores!

Kids make a paperclip perform an act of magnetic levitation and test how effective various materials are at magnetic shielding in this science fair project.

Your fourth grader will be astonished to discover the significance and intricacies of his spine as he builds a model of a human vertebral column.

Learn how to make marbleized paper with simple everyday ingredients in this fun activity! Your child will learn about oil and water while doing this project.

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

What is biodiversity? Kids will study different areas of their backyards to see which is the most diverse to learn about biodiversity and random sampling.

Science fair project that compares the freezing temperature of salt water and freshwater in order to learn about supercooling and condensation nuclei.

This taste buds science experiment demonstrates how strongly our sense of smell controls what we taste.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

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

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

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

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.

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

In this science fair project, students make their own rain gauge to measure rainfall.

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.

Examine which metal conducts more heat by boiling water in 3 pans made of aluminum, copper, and stainless steel.

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

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

Make some easy homemade yogurt with your young scientist, and see what a few 'live' bacteria can do in the right conditions!

In this experiment you explore how tectonic plates move to create land and expand bodies of water.

Glass is see-through, but usually you can still see that it is there. In this experiment, we use baby oil to make glass go completely invisible.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

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

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.