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

This simple "how to make a water wheel" activity makes physics come alive for your child by demonstrating how different kinds of energy work.

Have your child build his own mini waterfall, and help him develop his planning, problem solving, and architectural skills.

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

Planning a beach vacation? Here's a cool nature craft you can make in the sand with your child.