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Create a mini plant habitat with your kid to help teach him what it takes to make an ecosystem work.

Make your own marshmallows and mix up some very interesting third grade chemistry lessons while you're at it!

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

Is it magic? No...it's the amazing, gravity-defying capillary action experiment! Kids will love this dramatic and enlightening science fair project.

Did you know a mouse eats almost fifty times as much as a cow? Find out how and test out the strange science with your friends!

In this activity, your child will be challenged to use simple materials to create a catapult for a small, lightweight toy.

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

In this science fair project, kids will be able to see where germs reside on their hands while gaining insight into the benefits of thorough hand washing.

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

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

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

How do we know that air exists when we can't see it, taste it, or touch it? Here's a classic experiment that will teach your kid some basics of aerodynamics!

Is our water polluted? Help your young scientist understand the importance of taking care of the environment with this simple experiment.

Your child might have noticed how bubbles quickly lose their colors and pop. Check out this creative way to make those bubbles last longer.

This science fair project idea investigates the difference in reaction times between boys and girls.

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

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!

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

Help your child celebrate the summer and the sun by making a sandy seascape.

Help your child make a beautiful homemade sandcastle that will last!

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

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.

Develop your child's mathematical and engineering skills with this fun building brick challenge. In this activity, your learner will be challenged to create a boat out of building bricks.

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 science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

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

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!