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

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

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.

Jazz up your patio or backyard with hip and quirky planters made from simple Mason jars.

What can you do with hair after its cut? This science project teaches you practical uses for human hair.

How good are humans at sound localization? Kids can try this cool science fair project idea to see how good their friends are at judging sound direction.

Make a DIY golf putter and design your own golf putting course in this 2nd-3rd grade arts and crafts/game activity.

Demonstrate how static electricity can cause an object to move. It also examines just how an object affected by static electricity will move.

This second grade arts and crafts activity is all about caterpillars emerging from their cocoons as butterflies.

This science fair project idea explores substances that cause a bubble to last longer.

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

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

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

This science fair project idea investigates how the shape of an object affects drag.

This science fair project idea investigates if webbed feet help a duck (and others) swim.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

How do you tell time without a watch? Use the sun! This simple activity will show your child how to build his own sundial.

Teach your fifth grader about the wonders of wind by making and observing this winter wind chime.

This classic children's game demonstrates how sound travels through air vs. through a solid.

Got a birdwatcher on your hands? Bring the birds to your backyard by making a zany bird feeder using an orange and some string.

In this fun design challenge, your child will get creative with making structures out of toothpicks and gumdrop candies.

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

In this activity, young learners will make a balance using a plastic hanger and weigh a variety of small objects using candy corn.

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

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

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

Many ancient cultures used the rising or setting sun to create calendars. Observe the setting sun once a week to come up with your own solar calendar!

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