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

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."

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.

Encourage imagination and creativity with this magical craft that lets your child make and design his very own dragon egg.

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

Transform your kitchen table into a winter wonderland with a cookie and cocoa party that looks freshly dusted with snow.

Stringy orange ghoul guts are actually a healthy and gross-looking appetizer for your child's Halloween party.

The next time you've got a restless second grade earth scientist on your hands, use this experiment to demonstrate crystals and make a tasty treat, too!

These delicious Easter Basket Cupcakes are a simple, creative holiday treat. These cupcakes sit in waffle bowls with festive coconut grass and jellybean eggs.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

Try this simple activity with your child to guesstimate the age of a tree in your yard and nurture her developing math skills while you're at it!

This Christmas plate features your child's favorite holiday things through drawings. Make a Christmas plate with your child this holiday season.

This project tests the hypothesis that dark colors absorb more heat than light colors.

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

Make this delicious warm apple bread for Hanukkah.

This science fair project idea identifies clouds as a means of predicting the weather.

This fall, bake some festive caramel apple cupcakes with your second grader and help her build her math skills while you're at it!

In this science fair project, kids measure how weather conditions affect how fast a puddle evaporates.

Hiding protein-rich quinoa and a variety of fresh vegetables, these meatballs are the perfect answer to kid food woes.

Make this easy recipe for Halloween, featuring white chocolate and pretzels, for a crispy, creepy treat!