This science fair project idea explores if the length of the string that an object is suspended on has an effect on how fast or slow it swings.

This science fair project idea explores how length affects the weight a bridge can hold.

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

Take to the air with science by experimenting with helicopter seeds right in your own backyard!

This science fair project idea investigates how color affects temperature.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

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.

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

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

We all know that the Moon has different phases, but it can be hard to figure out why. Try this activity to see how the Moon's phases really work.

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

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

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

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.

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

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

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!

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

In this science project, the center of gravity is explored.

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

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

The project investigates how friction affects motion by using different surface textures.

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

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

The project determines which type of birds prefer which type of birdseed.

Incorporate some math and science thinking into your annual fall fun with this pumpkin investigation activity! Your child will have a blast investigating various ways of measuring pumpkins, making estimates, taking measurements, and recording their findin