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.

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

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

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.

What's the quickest way to separate salt and pepper? Let static electricity do the work! Your child will be fascinated by this simple experiment.

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.

This science fair project idea investigates which objects float and sink in honey, water, and oil.

Ready for takeoff! Make science fun and teach about levers and fulcrums as your child sends buttons flying.

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 first grade ladybug game that explores how air can move solid objects, and adds some measurement practice, too. Play, learn, and enjoy!

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.

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 recipe makes bubbles that not only blow up nice and big, but do tricks and experiments! How do you do it? It's not a secret, it's science!

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

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

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

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

Help your child experiment with the combination of acid and baking soda by making these homemade bath bombs!

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

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

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.