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

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

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

This classic children's game demonstrates how sound travels through air vs. through a solid.

It's easier than you think to make homemade play dough -- just a few pantry staples makes a natural version of the toy that kids have loved for generations.

Here's a science experiment that gives your kids a chance to see how fire needs oxygen to burn, with a little math and writing practice thrown in.

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 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.

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.

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

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.

Satisfy your sweet tooth with this easy summer activity! Make homemade ice cream and let your child practice his science skills.

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.

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

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.

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

Explore the scientific concept of capacity by seeing how many pennies you boat can hold before it sinks!

How do we know that air exists when we can't see it, taste it, or touch it? Here's a classic experiment that will teach your kid some basics of aerodynamics!

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

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.

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

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

How do people move pianos and heavy furniture into tall buildings? Show your kids some pulley potential with this simple household exercise!

Did you ever think you could make colors disappear right before your eyes? This science experiment is just like a magic trick: now you see it, now you don't!

Engineers in training can get started with this simple wheel-and-axle construction activity.

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

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