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

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!

Use playing cards to learn about temperature as well as positive and negative integers in this fourth grade math game.

Learn how starch and carbohydrates interact with different solvents in this fun and easy packing peanut science fair project.

These handmade Christmas treat cups are perfect for house parties, school celebrations, and holiday bake sales.

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

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

A food groups plate shows your child what category her foods belong in. Make a food groups plate with your child before dinnertime.

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

If you're looking for a fun way to have your child gain practice pattern-making while working out fine motor skills, making Washi eggs is the perfect activity.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

Introduce your child to science with something they see everyday--their shadow!

Introduce your fourth or fifth grader to volume by having him build rectangular prisms, and then count each sugar cube to check his volume calculations.

Help your kids fall in love with nature by making a simple clay bird bath. Set it up in your yard and watch the animals venture in for a sip of water.

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

Countries all around the world have been using the abacus for thousands of years to make math easier. Have your kid make his own abacus to practice arithmetic.

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

These cute holly-shaped hair clips are a breeze to make for holiday celebrations. They make a great party activity, too!

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

Pumpkin carving party activities are great for a pre-Halloween party. Try pumpkin carving party activities, including jack-o'-lantern ideas and fall recipes.

These pretzel reindeer cookies are a great holiday recipe for kids to make. Rudolph and the whole gang agree!

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

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?

Here's a fun math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.

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.

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

How many steps long is the hallway? Kids put their graph-making skills to work as they make a step map of their own house.

In this insulation experiment, you'll learn which clothes keep you warm in the cold, and which make you shiver.