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Here's a fun activity that will introduce your fourth grader to the concept of frictionless motion by constructing a hovercraft.

Help your fifth grader execute this experiment involving a lit candle (submerged in water!) to show him the wonders of heat energy transference.

This science fair project idea provides evidence that air is everywhere and takes up space.

Kids will create their own version of Richard Feynman's rubber band heat engine to learn about thermodynamics with this cool science fair project idea.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

Learn how to make a weathervane with this fun and simple meteorology project for fourth graders.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

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.

Some fossils have been been preserved for billions of years! Help your kid understand how fossils are created and preserved with this crafty 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 an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

This science fair project examines how seeds hitchhike on animals and clothing.

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.

Learn all about balance and motion as your child designs a corn maze!

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

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

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

Have your child build a model of a coral polyp, one of the tiny animals that composes a coral reef.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

In this game, players will learn interesting facts about animal adaption and practice them using a fun matching card game!

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.

An home science experiment for older students that teaches about the science behind heat.

Take advantage of the fact that ink and water don't mix and introduce your kid to suminagashi, a Japanese form of art.

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

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

Construct and experiment with a periscope using reflected light rays to gather an image.

Does electricity move better through thick wires or thin ones? kids will conduct this classic electricity experiment for this science fair project.