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

Science fair project which teaches you about the principles of physics within a vacuum by creating a vacuum chamber.

In this microwave plant experiment, find out whether microwave radiation will affect radish seed germination. Will it help or hinder the plants' growth?

Use simple items to create a kindergarten "grow box" that lets a kid see just how salad plants send down their roots and grow underground.

Encourage your child to think outside the bathtub by making her very own handmade soaps! Perfect as a present, a decoration, or just to pamper herself.

This science fair project idea explores the egg's thin membrane.

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

The objective of this science fair project idea is to examine light refraction as it passes through liquid crystals.

Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

Create safe lightning for kids! They'll learn how to make lightning at home with this fun science fair project idea illustrating static charges and grounding.

The rock cycle will come alive for your child when he uses broken crayons to create the three basic rock types.

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

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.

In this science experiment, your child will test the strength of hollow structures in order to understand how strong bird bones really are.

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.

This experiment tests which gender is better at catching how a magician performs his tricks.

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

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

Is your child a nature nut with an eye for creative, green-friendly projects? Introduce them to this amazing DIY bird feeder!

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

What does a raindrop look like when it splashes on the ground? Is each raindrop unique like snowflakes? Find out how raindrop size varies in this experiment.

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.

Grow potatoes in a plastic bag—easy to grow and harvest, and yummy to eat!

This science fair project investigates why the number of visible stars changes from place to place.

Perk up your front porch with this hanging vase craft, perfect for spring and for getting kids outdoors!

Grow borax crystals and get your child excited about Earth science with this crafty science experiment.

Science fair project which determines whether people are more likely to follow rules if they are easy to understand.

Is there a relationship between caffeine and heart rate? Students will determine the effect of caffeine on heart rate in this fun science fair project.