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

Need to cool down on a hot summer night? This gazpacho recipe does the trick.

Make this cool iPod or cell phone case for Dad out of one of his little-used ties.

Invite your second grader to help you measure and mix these fresh, cool concoctions!

This science fair project idea creates cool new colorful fabric pattern designs and experiments with the mixing of colors.

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

Construct a card castle fit for a king! Treat your royal "face" cards (the kings, queens, and jacks) to the cool castle they deserve.

Looking for a cool game to help your first grader learn her 11s? Look no further than this clever one-person card game.

Kids will explore the corrosiveness of soda in this cool science fair project by leaving pennies submerged in soda overnight.

These cool treats are loaded with fruit, veggies, protein, and calcium, just what your child needs to fuel up for a busy day at school.

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

Looking for hot weather fun? Cool the kids down with a homemade slip and slide! You can create your own water park atmosphere for just a few bucks.

Planning a beach vacation? Here's a cool nature craft you can make in the sand with your child.

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

Learn Halloween fun facts and put them in this cool art project. Make a Halloween fun facts foldable with your child this October.

Here's an activity to encourage your young artist to read. Invite your child to visualize directions on colors, numbers, and shapes to create cool pictures!

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

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.

The fish most kids see is usually filleted, and it's hard to see how it came from a lake or sea. This cool gyotaku activity blends life science with art!

Make math fun for your child by turning it into a game and challenging him to beat the calculator with this cool math race!

Make a candy wrapper collage with your leftover candy wrappers! This candy wrapper collage is a cool, upcycled post-Halloween craft project.

With this cool floating rocks project, your child will get some hands-on experience with buoyancy and learn why certain rocks like pumice are able to float.

Think you can blow up a balloon without using your mouth? This isn't just a cool trick, it's also a great way to introduce chemistry and biology concepts.

What do worms eat? Kids find out what kinds of rotting leaves and vegetables worms prefer in this cool compost science fair project.

Help your first grader, second grader, or third grader boost his addition skills and math vocabulary with this fun summer game Ice Cream Addition!

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 witches' brew recipe for kids is a cool mix of lemonade, tapioca pearl "eggs," and gummy worms. Try this witches' brew recipe for kids this Halloween.

Your third grader will delight in making this creepy night-flying creature using a simple pom pom!

For a cool art project, help your child create a "Me Timeline," a unique poster that works on a key math and social studies skill: putting events in order.