In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

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.

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.

Show your kids the power of baking powder by conducting a simple experiment. Make four batches of cornbread, all identical except for one thing: baking powder!

Make a DIY golf putter and design your own golf putting course in this 2nd-3rd grade arts and crafts/game activity.

In this 3rd grade science activity, you'll experiment with the little-known fourth state of matter: polymers! Mix borax with white glue and watch what happens.

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

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

Help your second grade scientist explore the timely topic of wind speed using a version of the classic Beaufort Scale.

This second grade arts and crafts activity is all about caterpillars emerging from their cocoons as butterflies.

Crystals are a very special structure. In this third grade activity, your child will learn how to grow salt crystals.

Try this simple 2nd grade science experiment to teach your child about the principles of luminosity and light reflection.

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

Learn about lateral earthquake motion and its effect on high rise buildings in this simple 4th grade earth science experiment.

Put your second grade scientist to work this Fourth of July with our colorful "liquid fireworks" project!

This 4th of July, explore fourth grade science and make some safe fireworks in your own backyard using soda pop!

First grade science often covers solids, liquids, and gases. This silly science explores serious facts about the difference between all three.

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!

Beetles come in many shapes and colors. Here's how your second grade child can create his own beetles to paint and play with!

Let your fourth grade chef mix up butter and sugar with scientific principles about different states of matter, and get delicious toffee, too.

This first grade science activity brings the green grass of early spring inside while teaching your child about the cycles of growth.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

Here's a fourth grade science craft with lots of benefits: it's good for birds, good for your child's learning, and good for the planet, too.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

This kinesthetic learning activity will help your fourth grader get a firm grasp on the immensity of the solar system.

Air invisible; it doesn't make sounds; you can't pick it up and throw it. So how do we know it exists? Help your second grade scientist figure it out.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

Find out whether packaged seeds actually do expire in this new science fair project idea.