Has your child ever asked you how a submarine works? Here's a simple bathtub project that will make for a hands-on answer.

This science fair project idea determines which method of hand cleansing is the most effective.

This science project has students study a group of volunteer liars actively lying to study the behavior of a lie. Students see if they can figure out the truth.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

For a fun family activity to introduce your child to genetics, have your child go on a search for dominant and recessive family genes!

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

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!

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

Is there a relationship between caffeine and heart rate? Students will determine the effect of caffeine on heart rate in this fun science fair project.

In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

In this science fair project, students focus sunlight with a magnifying glass and trap shorter waves to melt ice.

In this science experiment, your child will test the strength of hollow structures in order to understand how strong bird bones really are.

This science fair project idea investigates if webbed feet help a duck (and others) swim.

Here is a hands-on activity to help third graders understand the four points of a compass...and how we use them to get around.

Help your child create a working lung model that fills with air just like the lungs inside of his own chest when he breathes.