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.

Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.

Introduce your second grader to the crazy world of static electricity with just a balloon and a sheet of paper.

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

Learn about this simple machine and make a pulley of your own to use for fun science trials.

Introduce your child to the importance of preserving the world's biodiversity by turning a lesson on endangered species into a fun game for the whole family.

Using scherenschnitte, your science-savvy second grader will be able to create and display each part of a vegetable!

In this science fair project, students use the streak test to tell minerals apart from each other.

This science fair project idea explores whether talking to a plant will help it grow.

Try this chemistry experiment with your curious kid and get some "shocking" results!

This science project teaches students to classify different shapes of leaves.

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!

Looking for a fun summer adventure? Learn what it was like to be a prospector during the California Gold Rush by panning for gold in a local creek.

In this activity, your child will be challenged to make a tower using paper cups.

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

Let your second grader pay homage to an ancient Olympic tradition with this modern day Olympic wreath!

Encourage a group of third graders to play this fun game of Whistle Hide-and-Seek as a warm-up to get them prepared for finding a "lost" camper.

Your child can use leaves and grass to create his own outdoor art in celebration of Earth Day...all he needs are is the great outdoors and some creativity!

Introduce your child to the world of motion and physics with a bit of marble play inspired by Sir Isaac Newton!

Create a self-portrait from natural materials in this collage craft activity!

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

In this experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

Enter the buzz worthy world of bee watching and find out what time bees like to wake up!

Take to the air with science by experimenting with helicopter seeds right in your own backyard!

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

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

Help your child plant a "tea garden": a garden made of herbs for making teas.

If your mom likes flowers, make her a sweet gift that she'll treasure with this fun craft, a pretty Pressed Flowers Card!

Make a planter full of delicious seasonings and classic grilling vegetables, great for a Fatherâs Day gift or a fun start-of-summer outdoor activity.