In this fun science fair project idea learn the difference between additive and subtractive color and why they are handled differently.

Has your kid noticed how much bigger the moon looks when it's low in the sky? Here's an activity you can do to show them that it's just an optical illusion.

Look for a correlation between temperature and the intensity of cricket chirping. Measure ambient temperature and sound intensity in decibels.

An hour glass, also known as a sand clock, keeps time. In this activity, your child will make her own sand clock and measure the time it keeps.

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

In this science fair experiment, students learn about the scientific principles behind Doppler ultrasound.

Build an electroscope, a simple device that measures static electricity, or the freely flowing electrical charges of the atmosphere!

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!

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.

What happens when colored beams of light mix? You might be surprised.

Discover the force of water! This article provides step-by-step instructions for creating your own science experiment.

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.

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.

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!

Believe it or not, images that are cast upon your eye's light-sensitive screen (called the retina) are upside down. Here's a fun, fast experiment to prove it!

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 physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

Introduce your child to science with something they see everyday--their shadow!

.Have you ever had problems with your wifi signal strength? In this experiment you will learn about how wireless signals pass through the air and solid objects.

Think you can blow up a balloon without using your mouth? This isn't just a cool trick, it's also a great way to introduce chemistry and biology concepts.

Have you or your child ever heard that nursery rhyme and wondered just what curds and whey are anyway? Do this simple experiment together to find out!

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

In this 3rd grade science activity, you'll experiment with the little-known fourth state of matter: polymers! Mix borax with white glue and watch what happens.

This experiment will explore how mallets of various materials and weight create sonic tones of varying lengths.

Introduce your child to the amazing, almost magical phenomenon of static electricity!

This science fair project idea demonstrates sonar mapping of the ocean floor.

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.