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.

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.

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.

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.

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

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.

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.

Making a calendar is a great way for third graders to identify those words that are always capitalized. Here's how to get started.

Ask your kids to write these one-sentence "Holiday Wishes." Without realizing it, they'll be building third grade Language Arts skills.

Create equations in this strategic math card game. Your second or third grader can practice addition, subtraction, multiplication, and division in a new way!

Build second and third grade writing skills by using pictures to help kids "see" how to use details in their stories.

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

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.

Encourage your child to eat nutritiously by having them build this delicious summer fruit cone!

Wool can absorb 1/3 of its weight in water, while still keeping the body warm. She can test this theory by performing a scientific sock comparison!

If you love the idea of handing out holiday tins of homemade cookies but you're not a baker, chocolate-covered apples are the perfect solution.

Pureed ripe peaches, vanilla yogurt, agave nectar, and juicy chunks of peach come together to form a refreshing pop that hits the spot on a hot summer day.

Knowing your antonyms from your synonyms is an important part of the second grade writing curriculum, and is a real boon for vocabulary.

Think you need a special dehydrator to make your own fruit leather? You can actually make a delicious version of this popular kid's snack in your own oven.

Get inspired by the summer skies for a delicious parfait that looks as good as it tastes!

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

Measuring and mixing is half the fun with these Irish oatmeal cookies, and it's a great way to introduce your second grader to cooking and kitchen tools.