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

Kids will create their own version of Richard Feynman's rubber band heat engine to learn about thermodynamics with this cool science fair project idea.

For most second graders, a good secret code is just about irresistible. Here's one that builds math facts while you're at it!

Young physicists will wrestle with a discrepant event: the Hammer Ruler Trick. They'll make some inferences about torque, balance, and center of gravity.

Have your student draft a blueprint for a haunted house, and trick (or treat) them into learning about geometry in the process.

Learn about coins and their value by making an animal piggy bank. Here's how to make a lion, pig, or sheep bank!

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

Little scientists will make inferences about hearing loss, pitch, and frequency in this great science fair idea that puts the human ear to the test.

This science fair project teaches you about what makes persimmons so tart and how astringency can be removed by studying the effect of tannins on fruit.

If your 2nd grade child asks for time often, encourage him to read time on his own by talking about time throughout the day.

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

What is the hydrologic cycle and how does it work? Check out this fun and easy science project where you will model and learn about Earth's water cycle!

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 back into school with this exciting architecture exploration! In this craft activity your child will research, draw, and build his own school.

Based on the concept of water's "freezing point," this activity entails the lowering of water's freezing point to chill ice cream!

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

Try this fun and simple activity to help nurture your child's observation skills and nourish a growing love of science!

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

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

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

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

How much does 100 weigh? Play this fun guessing game with your child to commemorate the 100th day of school.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

Recycle old materials to create a fun, brain-teasing maze toy that also strengthens your child's math reasoning skills.

Simple and straightforward, this money math game helps kids practice counting, adding change, and working with decimals.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

Work on division with remainders in this fun fourth grade math board game.

This experiment uses a yeast solution, liquid detergent, and hydrogen peroxide to produce an exciting reaction like no other!

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

Do plants breathe? Not exactly. They do respire though! This activity will help your child with see that plants are producing the oxygen we need to survive.