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

A simple science experiment exploring the physics of water pressure that's been amazing people since Medieval times.

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

Get your sense of humor ready for this fun science experiment that demonstrates the fundamental physics of air pressure.

Turn the common pastime of constructing paper airplanes into a lesson on the physics of aerodynamics and flight with this fun science activity.

Science fair project which teaches you about the principles of physics within a vacuum by creating a vacuum chamber.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

Combine the science of physics with the fun of playing spy. Your young detective can make his own tiny looking glass. It's simple to make!

Want to see a great example of Newton's first law? Kids will learn about basic physics with this fun, ballistic experiment.

Does the temperature of a magnet affect its strength? Learn about the relationship between magnets and temperature with this cool physics science fair project.

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

Help your child get a grasp on what it was like to build gigantic ancient structures with this easy engineering activity about science and physics.

In this experiment, you'll make a seafloor spreading model to learn more about how plate tectonics work and create mid-ocean ridges.

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

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.