In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

Find out the differences (if any) in the frequencies of voices produced from a computer, from a phone, and directly coming out of the voice box of a human.

Every time a sound is produced it emits a sound wave. This experiment demonstrates how sound travels, using nothing more than a spoon and a string!

This science project examines the history of earthquakes and what we can do to prevent future disasters.

This project examines Newton's First and Second Laws of Motion with a bicycle and water balloons.

Chemistry is a blast with this backyard bomb made from a sandwich bag. All you need are ingredients from the pantry to create a satisfying, and safe, explosion.

Water can go from solid to liquid to gas...but how does popcorn go from kernel to snack? Invite your first grade scientist to find out.

This surprisingly good glue recipe comes from common kitchen items.

Help your own young scientist tackle the wonders of static electricity from the comfort of his own home!

By using static electricity generated from their body, a child can cause a small fluorescent lamp bulb to light up!

How to test for acids and bases? In this activity you and your child can make your own indicator from red cabbage!

Design a hearing protection device to protect their ears from loud noises. Examine the properties of current protective hearing devices, materials.

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

Find a mathematical relationship between the intensity of a sound wave and distance from the sound source. Use a pedometer and a sound level meter.

This science activity will help your student explore the changes that occur to transform an egg from raw to soft to hard-boiled.

Conduct a simple science experiment to see if flowers from your garden pass the acid-base indicator test with this exciting chemistry activity.

Do this experiment to help your first grader understand how salt can be removed from salt water. All it takes are a few household materials.

How fast does light travel in different mediums? Kids conduct a cool refraction experiment in materials like water and air for this science fair project.

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 awesome diffraction grating experiment puts high school students' applied math skills to the test by having them calculate the wavelength of laser light.

This fun, think-outside-the-box activity introduces kids to gravity and other basic scientific concepts as they construct an impressive marble run!

What happens when light hits a hard surface? Find out by conducting a simple light reflection experiment with your preschooler.

Hone your child's skills of observation and take a look at forensic science for an interesting afternoon of exploration and detective work!

Explore the wave-particle duality of light! Learn how light can behave as both a wave and a particle in this cool physics science fair project idea for kids.

Use reusable, recyclable materials--along with a dose of imagination--to build a castle with first grade geometrical forms.

Popsicles aren't just for the summertime, this activity takes cold and turns it into a creative and tasty science experiment.

Play this flashlight game with your child to teach him about objects that are transparent, translucent, and opaque.

What is it about a Slinky that causes it to walk down the steps? This simple experiment is a perfect illustration of both gravity and momentum.

Teach your preschooler some physics that she can relate to with this fun and simple activity!

Illustrate the idea of light refraction with this exciting and mystifying experiment.