Test whether plants can grow without sunlight and water.

Use simple items to create a kindergarten "grow box" that lets a kid see just how salad plants send down their roots and grow underground.

Your child can help your family pet take a breather, and help herself relax, too, with this soothing activity.

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

How do mirrors work? What is light, and how does it travel? Explore light and reflection with your preschooler with these simple hands-on experiments.

This science fair project idea determines what household items are good conductors of electricity.

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

Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.

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

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

Want to make Halloween truly eerie? Science to the rescue! These ghouly hands come alive with a little help from simple chemistry.

This project compares the strength of one, two, and three-ply toilet paper.

This science fair project idea explores substances that cause a bubble to last longer.

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

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

This science fair project idea explores how enzyme inhibitors, active sites, non-competitive enzyme inhibitors, and substrates work.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

Introduce your child to the world of motion and physics with a bit of marble play inspired by Sir Isaac Newton!

Got a birdwatcher on your hands? Bring the birds to your backyard by making a zany bird feeder using an orange and some string.

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

This science fair project idea explores how length affects the weight a bridge can hold.

Put your young paleontologist's puzzle-solving skills to the test by having her hunt for dinosaur bones and then assemble them to create dinosaur skeletons.