Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

In this activity, children will let their imagination run wild as they design and build a new planet in the solar system.

In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.

This science fair project idea demonstrates that plants give off water.

Come take off your shoes and explore with your feet. Your child will embark on a barefoot adventure as he plays with different textures.

Grow a garden with an environmentally-friendly twist by using plant scraps that usually get thrown away.

This simple heat transfer experiment is a great introduction to the concepts of heat transfer and conduction.

Help your child experiment with the combination of acid and baking soda by making these homemade bath bombs!

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 activity works well with a group or just with a parent and child, and it can make a great party game since it's both fun and inexpensive.

Bring the fun of gardening indoors! By stuffing a simple pair of pantyhose with a few grass seeds on top, your child can grow her very own plant pet.

Here is a hands-on activity to help third graders understand the four points of a compass...and how we use them to get around.

This science fair project idea investigates if fats add to the flavor of food.

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

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

Inspire your child to learn about an amazing animal as she creates her very own polar bear habitat.

Introduce your second grader to the crazy world of static electricity with just a balloon and a sheet of paper.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

In this fun science experiment, kids will determine the best method for ripening avocados and discover the cool chemical reaction that makes this possible.

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

Get down to the rubber with this science project that tests the effectiveness of different types of erasers.

Let your second grader pay homage to an ancient Olympic tradition with this modern day Olympic wreath!

The concept of metamorphosis is fascinating to children of all ages. Help your child's creativity take flight as she makes her very own butterfly life cycle.

Before Twitter, birds were the ones tweeting, not humans. Have your child discover the magical sounds of nature while recording birds around his neighborhood!

Create your own cloud with an activity that will explain how important concepts such as evaporation, condensation, and precipitation work.

Before your treat your child (and yourself!) to a yummy snack, help her learn a little about Sir Isaac Newton's First Law of Motion!

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!

You don't need to wait for rain to see a rainbow. Make one yourself, and teach your child about light and weather in the process.

In this activity, your child will transform an egg into a glowing, bouncy "ball" that they can play with.

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