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.

Learn how the focal length of a lens affects a magnifying glass's magnifying power in this cool science fair project idea for 8th grade.

For your budding first grade scientist, all you need is some simple, natural materials to create an amazing ant farm. Here's how to get started.

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.

Your 1st grade scientist will improve her observation skills as she's encouraged to eat healthy by comparing the dry and fresh fruit in this experiment.

Show your fifth grade scientist how to create a siphon using two buckets, plastic tubing, and water. Watch her astonishment as the water travels uphill!

Here's a fun activity to help build thinking skills in young first grade scientists, and to encourage them to have a blast exploring the mass and volume.

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 fun science fair project for 8th grade demonstrates what Kepler's 3rd law predicts about a planet's orbital period and its distance from the sun.

What heats up fasterâwater or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

Learn how to grow an avocado plant indoors with your 1st grader in this hands-on gardening activity.

Science isn't ho hum anymore when it involves building catapults to teach your fifth grader about projectile motion.

Make edible amber fossils with your second grader to explore the fascinating world of science!

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

This winter garden project is just about bomb-proof, and believe it or not, it might even make a great gift. So get craft happy with your first grader!

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

Teach your creative second grader about proportions, animals, and proper cutting methods with cucumber carving.

On the next chilly, winter day, invite your fifth grader to make a hand warmer by experimenting with the loaded combination of a few natural ingredients.

Do this experiment to help your first grader understand how salt can be removed from salt water. All it takes are a few household materials.

This easy Halloween-themed science experiment for first-graders is perfect for chilly October afternoons or great as a Halloween party activity.

The next time you and your fifth grader go on a hike, take along this key to figure out which common North American animal left a track along the river bank.

Help your first grader explore the world of scientific measurement by "weighing" fruit with a "water scale"!

Help your fifth grader embrace the roots--literally--of Mother's Day by growing carnations to honor mothers in you family's history.

Observe with your third grader what happens when food starts to decompose, and boost science skills simultaneously with this experiment!

Take the art making outside: have your first grader make a clay relief sculpture of the natural world. This is a great activity for summer.

This activity is a fun way for your first grader to learn about how veggies help your body while being creative with art and drama. Here's how to get started.

Combine science with reading and art to help your first grader create an attractive holiday gift for a beloved friend or relative.

Help your first grader design and create his very own bird feeder out of an empty milk carton.

This craft is a great way to explore the fascinating world of spiders and their webs as you collect spider webs from around your house with your third grader.

Here's a science activity that lets a first grader use an empty dish detergent bottle to create his own fountain as he explores air pressure.