This science fair project idea examines liquids of different densities.

In this project, a model of a submarine is built to simulate the buoyancy and displacement of water and air.

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

Find out whether putting something on top of a plant will inhibit its growth.

This is a quick, easy science fair project that conveys the idea of density to upper elementary students.

Wondering how we know that air is there? Here's a quick and easy experiment that proves that air may be thin, but it's not too wimpy to block your shot!

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

Help your first grader explore the world of scientific measurement by "weighing" fruit with a "water scale"!

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

Find out whether a longer airplane will fly farther or a wider paper airplane.

Nature is the greatest teacher, and you can help facilitate the lesson! Here's how to create a supply backpack to get your kid ready for science action!

Help your kindergarten or first grade child use his creativity to make a beautiful magnetic patterned structure while discovering the wonders of magnets.

This is a fun way to introduce kids to the concept of volume, and give them a quick hands-on activity to boot.

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.

In this science fair project, learn how a mineral streak is made and how it can help identify an unknown mineral.

While your cells are much too small to see without a microscope, you can create the look of a cell in your very own home with just an egg and vinegar!

Teach your child the meaning of recycle and reuse by repurposing plastic spoons as plant markers for your vegetable garden.

In this activity, students will think about the form and function of household objects as they compare and contrast kitchen serving spoons of various sizes and designs.

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

Encourage your kindergartener to investigate and chronicle the weather she observes during the coldest months of the year.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

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!

Your second grader will love this simple soda bottle race car activity. Make a ramp and customize your car for an entertaining way to learn scientific concepts.

Your child grows a green thumb and flowers with this seed planting activity that also celebrates the 100th day of school!

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

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

What's cooler than an explosion? Not much! This simple science experiment lets kids build their own pop rocket. So put on your safety goggles and let her rip.

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.

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.

The goal of this project is to create an exciting topographical map out of dough.