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.

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.

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

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.

This quick and simple preschool mirror activity will introduce your child to the science of reflection and light with a flashlight experiment and picture game.

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!

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

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

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!

This activity is a fun way to "go fishing" with your preschooler, while learning about the concepts of freezing and melting.

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

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 fun, think-outside-the-box activity introduces kids to gravity and other basic scientific concepts as they construct an impressive marble run!

Help your child explore chromatography, which is the process of separating colors or pigments, and create a neat art project in the process!

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

This homemade parachute toy is incredibly easy to build. Plus, it gives kids an excuse to investigate and experiment...the backbone of kindergarten science.