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

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.

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

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

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

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

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 math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.

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

Is it solid or liquid? Create oobleck and witness the amazingly weird oscillation between the two!

Get your hands on a concoction that breaks the rules about what's a solid and what's a liquid.

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

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

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

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

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

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

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

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

Your kid can learn about the process of making frozen yogurt and enjoy a homemade, flavorful dessert. Experiment with this fun, chilly food!

This is a fun way to introduce kids to the concept of volume, and give them a quick hands-on activity to boot.

Your child might have noticed how bubbles quickly lose their colors and pop. Check out this creative way to make those bubbles last longer.

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 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.

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.

What's cooler than an explosion? Not much! This simple science experiment lets kids build their own pop rocket. So put on your safety goggles and let her rip.

Chemistry is a blast with this backyard bomb made from a sandwich bag. All you need are ingredients from the pantry to create a satisfying, and safe, explosion.

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.

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.

What's a liquid? What's a solid? What better way to experiment than by turning a childhood favorite, ice cream, into a homemade science lesson!