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Is it a square or a circle? See if you can trick your friends with this zany science project!

Put an oatmeal box, a flashlight, and some construction paper together and you have the makings of an incredibly cool bedroom planetarium!

Get your child math and science savvy with this fun outdoor classification game. Using chalk, your child will classify what she sees in the natural world.

This is a quick, easy science fair project that conveys the idea of density to preschool and early elementary children.

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

The goal of this fun science fair project idea is to microwave candy and investigate: do some colors of M&Ms melt faster than others?

Want to spark your third grader's interest in gardening? Help him make popsicle stick fairies to decorate an enchanting garden oasis.

Make a wish upon a tree with this craft that also helps your child learn more about Chinese culture.

Delight your budding scientist with this cool physics magic trick and teach her some basic physics concepts while you're at it!

Help your child measure breezy weather in her environment by making a wind vane for kids, a simple version of the classic scientific measurement tool.

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.

Slip some science into storm watching with a homemade rain gauge!

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

Kids often ask, "how tall am I?" This science fair project seeks to determine how well kids can guess their own heights.

Are you ready to be a detective for science? Then get out your magnifying glass and start studying fingerprints!

Play this flashlight game with your child to teach him about objects that are transparent, translucent, and opaque.

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

Give your local birds a treat — and your young birdwatcher some fun — with this simple DIY bird feeder.

The rock cycle will come alive for your child when he uses broken crayons to create the three basic rock types.

Check out this fun science fair project idea for 1st grade: a solar eclipse model that demonstrates total, partial, and annular solar eclipses.

Help your first grade scientist learn about metamorphosis by observing the life cycle of some interesting creepy crawlies.