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

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

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.

Create a homemade pair of sunglasses with colored lenses to see just how light and color affect our sight! Use this fun project to practice science!

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.

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!

The pinwheel is a simple toy that has been around for years and uses the wonders of the wind to spin it and delight kids of all ages!

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

Here's a great activity that uses corks and toothpicks to create a fleet of floating boats. Which design makes for the most seaworthy vessel?

In this activity, young learners will make a balance using a plastic hanger and weigh a variety of small objects using candy corn.

Learn to solve a crime scene investigation using an important forensics tool: oblique lighting.

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

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.

Teach your child about using pumps to move water in this simple and educational preschool science activity!

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

This balloon-powered car project is a great way for your kid to learn about energy and how it can be used efficiently.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

Here's a classic celery science experiment that uses celery and food coloring to demonstrate how plants absorb water.

Think you can blow up a balloon without using your mouth? This isn't just a cool trick, it's also a great way to introduce chemistry and biology concepts.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

Your child will do a fun science experiment using soap and pepper flakes to help understand the concepts of water molecules and the surface tension of water.

Make your own helicopter using a paper clip and a sheet of paper. Hold the spinner up in the air, let it go, and watch it spin gracefully to the ground.

This fun marbled paper craft uses things you're likely to have around your house, and it teaches kids some simple chemistry too!

This trick uses vertical and horizontal forces to help your child to push apart your hands apart, no matter how hard you try to keep them together!

Bring the magic and mystery of the night sky to the light of day with this fun constellation art project!

When you see those sunscreen "protection levels," what does that really mean? Try this experiment to find out.

Household items and a bit of imagination will create a CSI kit for your child to have investigative adventures with. Explore the world of forensic science!

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

Has your child ever asked you how a submarine works? Here's a simple bathtub project that will make for a hands-on answer.