In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

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

Make meringues with your first grader and see how states of matter can transform before your very eyes. Here's how:

This science fair project idea compares biodiversity between drops of water.

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

Help your first grader design and create his very own bird feeder out of an empty milk carton.

This project leads to an understanding that a whole may be built of smaller parts that fit and work together and provides an introduction to basic tools.

Does your child love learning about dinosaurs? Does he like digging around in search of hidden treasures? In this fun activity he'll do both!

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

In this science fair project, young children discover what happens when two fluids that have different densities get together.

In this fun activity, your child will create their very own solar oven to bake s'mores!

Try this fun and simple activity to help nurture your child's observation skills and nourish a growing love of science!

In this activity your child will create their very own marble maze!

This science fair project idea examines the reason boats are shaped and engineered.

Encourage your child to think outside the bathtub by making her very own handmade soaps! Perfect as a present, a decoration, or just to pamper herself.

Making your own glass cleaner is easy, effective and inexpensive!

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

Air invisible; it doesn't make sounds; you can't pick it up and throw it. So how do we know it exists? Help your second grade scientist figure it out.

This activity works well with a group or just with a parent and child, and it can make a great party game since it's both fun and inexpensive.

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

Science fair project that develops latent fingerprints on a non-porous objects by converting superglue from a solid state to a gaseous state.

Take this "paper plate snack test" with your child for a hands-on lesson in making healthier choices to teach your child about what's in his food.

Are you ready to be a detective for science? Then get out your magnifying glass and start studying fingerprints!

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

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

This weather spinner will improve observation skills by encouraging children to examine and track weather details and patterns.

In this project children practice the scientific method while playing with puffy paint.

Here's a great early reading and science activity for curious children. Learn how to plant your child's name in seeds for a growing writing activity!