Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

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

This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

The objective of this science fair project is to study the photosynthesis process and demonstrate the important role that leaves play in the process.

Have you ever noticed the ridges on a dog's nose? In this project, we take several dogs' nose prints and discover just how unique they are!

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!

Here's a fun math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.

This basketball project explores the best way to make the perfect shot every time.

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

Uh-oh! Is that a pill sitting on the counter or a piece of candy?

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.

How do we know that air exists when we can't see it, taste it, or touch it? Here's a classic experiment that will teach your kid some basics of aerodynamics!

This science fair project idea investigates how the shape of an object affects drag.

In this simple science project, learn about what causes dew and what affects dew formation with a drinking glass, ice, and a soda bottle.

Slime: It's oozy, it's goopy, and it's just plain fun! Learn how to make slime with this fun science fair project.

Invite your fifth grader to test the different rates of liquid absorption in synthetic and cotton materials, such as nylon and cotton.

Does electricity move better through thick wires or thin ones? kids will conduct this classic electricity experiment for this science fair project.

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

Students pit the heat capacity of water against the heat capacity of oil while looking at the effects of dipole rotation in this cool science fair project idea.

Recycling may be a confusing concept for your little one, so take the time to teach them the magic of compost - right in your own backyard!

This project examines what types of objects burn and which burn faster and cleaner.

The weather is a key kindergarten science concept. With this activity your child will learn about wind direction and create a self portrait, too!

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.

Try hammering some plants with your kids to teach them a valuable lesson in flower science while making beautiful artwork in the process!

In this fun design challenge, your child will get creative with making structures out of toothpicks and gumdrop candies.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

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

This experiment challenges students to forecast the weather based on the surrounding areas' weather.