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

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!

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

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

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!

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

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.

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.

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

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

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

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

In this science fair project, young children discover what happens when two fluids that have different densities get 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.

Take this "paper plate snack test" with your child for a hands-on lesson in making healthier choices to teach your child about what's in his food.

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

Introduce your child to the wonders of colorful chemistry with this simple food coloring project.

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

Blanket forts are a kid classic! Let your child create a âfortress of solitudeâ on his own for reading, telling scary stories or for cozy cocooning.

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

Delight your budding scientist with this cool physics magic trick and teach her some basic physics concepts while you're at it!

How do mirrors work? What is light, and how does it travel? Explore light and reflection with your preschooler with these simple hands-on experiments.

Explore solids and liquids with your young scientist by making gluep, a goopy substance that can behave like both a solid and a liquid!

Here's a fun science experiment that's refreshingly tasty too! Turn regular water into a tasty treat perfect for consuming on a hot day.

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

Help your kindergarten scientist discover relative size, density, and buoyancy with this fun, pumpkin science project!