Use reusable, recyclable materials--along with a dose of imagination--to build a castle with first grade geometrical forms.

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

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

Put a twist on traditional oil painting with this fun science activity that you and your first grader can do together.

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.

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!

Magic, science, or household cleanser? Let your second grader decide with this practical, nontoxic chemistry experiment with acids and bases.

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

Your second grader will love this simple soda bottle race car activity. Make a ramp and customize your car for an entertaining way to learn scientific concepts.

Teach your first grade scientist the difference between liquids and solids using maple syrup.

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

Help your kindergarten or first grade child use his creativity to make a beautiful magnetic patterned structure while discovering the wonders of magnets.

Here's a first grade ladybug game that explores how air can move solid objects, and adds some measurement practice, too. Play, learn, and enjoy!

Water can go from solid to liquid to gas...but how does popcorn go from kernel to snack? Invite your first grade scientist to find out.

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.

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.

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

This science exploration lets your first grader see how eggs can provide a perfect environment for a living, growing creature.

Make meringues with your first grader and see how states of matter can transform before your very eyes. Here's how:

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.

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.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

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

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

Try this experiment to give your curious kid a more "solid" understanding of how temperature affects the states of matter.

Help your child understand the scientific concept of evaporation with this fun outdoor science activity.

Play this flashlight game with your child to teach him about objects that are transparent, translucent, and opaque.

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.