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Air invisible; it doesn't make sounds; you can't pick it up and throw it. So how do we know it exists? Help your second grade scientist figure it out.

This season is a great time to explore the many shapes, sizes, and species of evergreen trees. Download our "field guide" activity and learn more!

Beetles come in many shapes and colors. Here's how your second grade child can create his own beetles to paint and play with!

Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?

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!

In this activity, your child will learn about a style of gardening that uses moss, also called "kokedama."

Discover whether a metal will expand under hot water.

This science fair project idea examines the reason boats are shaped and engineered.

What better way to celebrate spring than with a fabulous flower party? Pack the day with fun flower activities and treats for a truly springalicious event!

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

The goal of this golf science fair science fair project is to determine whether the temperature of a golf ball affects its elasticity and its rebound.

Crystals are a very special structure. In this third grade activity, your child will learn how to grow salt crystals.

Try this experiment to give your curious kid a more "solid" understanding of how temperature affects the states of matter.

Try this simple 2nd grade science experiment to teach your child about the principles of luminosity and light reflection.

Learn about the role of Earth's rotation on the Coriolis Effect and hurricanes in this science project. Model the Coriolis Effect on a hurricane's direction.

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

Have you ever noticed the way a dropped stone makes a fun pattern in a pond or lake? What's the science behind these splashy occurrences?

Make edible amber fossils with your second grader to explore the fascinating world of science!

Be a chemist for a day and study the simple reaction between sugar and heat. Try heating sugar and see what happens!

Your third grader will delight in learning about sound waves as he observes the different sounds created by tapping on glasses with varying amounts of water.

Has your kid noticed how much bigger the moon looks when it's low in the sky? Here's an activity you can do to show them that it's just an optical illusion.

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

Science fair project that examines albedo, and how this information is applied in the design of cars, sportswear, and other items. Which colors reflect light?

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.

Make a backbone model to explore human anatomy and life science.

In this activity, your child will be challenged to build a tall tower out of building bricks! The instructions include questions prompts to guide students through the design challenge.

Teach your creative second grader about proportions, animals, and proper cutting methods with cucumber carving.

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.