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

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

This science fair project idea researches how your choice of clothing affect how hot or cool you feel during the day.

How does salinity affect the point at which water freezes? Kids will find out by performing this cool melting ice experiment.

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

Practice multiplication facts by playing baseball in this fun, third grade math board game.

Practice conversions within the metric system in this fun math card game for third graders.

This fun math card game is a great opportunity to discuss probability with your third grader.

Play this fun basketball game to help your third grader master their multiplication tables.

Try this fun math card game with your third grader to practice division, addition, and problem solving!

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

Teach your third grader about the concepts money and purchasing with this "Mock Card Shop" activity.

Practice multiplication facts and geography at the same time in this fun third grade math card game.

Challenge your third-grader to sharpen her new math skills--and maybe do the planet a favor, too.

This interdisciplinary card game will have your third grader working on math facts as he travels through the solar system!

Multiplication facts are a necessary skill, and this board game provides a fun way for your third grader to practice them!

Make your own marshmallows and mix up some very interesting third grade chemistry lessons while you're at it!

Your third grader will be amazed at the explosive combination of vinegar and baking soda in these chocolate volcano cupcakes with white chocolate "lava."

Here's a math activity that uses coin riddles to help your third-grader improve his coin-counting and logical thinking skills.

Is your third grader bombing around on a bike these days? Here's a way to put all that fun time together with some math learning, too.

Probability can be a tough concept to master. Try playing this fun card game in order to help your third grader understand it a little better.

Most parents probably wouldn't mind subtracting 8-9 years off their age. Here's a fun third grade subtraction activity that may do just that.

Liven up a lesson about graphing by helping your third grader compile a bar graph from his classmates' birthday data.

Engage your third-grader in this version of the classic game and she will get lots of practice using mental math to solve addition and subtraction problems.

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

Marshmallows are made of sugar, water, and air pockets. Since the marshmallow is flexible, will air pressure cause it to expand when heated in a microwave?

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.

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.

Do you think heat can affect a plant's growth rate?

Homemade Halloween treats make great party foods for an All Hallow's Eve get together. These four homemade Halloween treats are scary-good.