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In this optics activity, learners use water to make a coin "appear" and "disappear." Use this activity to demonstrate how light refracts and introduce light as waves.

In this activity, learners create a water prism to break light into the seven colors of the rainbow.

In this activity, learners discover what happens when they crush wintergreen-flavored candies in a very dark room.

In this optics activity, learners use glass and water to demonstrate total internal reflection (TIR).

In this activity, learners will explore light and rainbows with this easy setup! Learners will only need a cup of water, some paper and a flashlight.

In this quick activity, Dracula has a hole in his house and learners help solve the problem by using a mirror and protractor to reflect incoming light out of his house.

In this quick and simple activity about reflexes (at the top of the webpage), learners conduct a simple test to explore pupillary response.

This is a quick activity/demonstration that introduces learners to the concept of index of refraction. Learners place stirring rods in a jar of water and notice they can see them clearly.

Align four color transparencies, each one a single color (cyan, magenta, yellow, and black), and see a beautiful full color image.

Create an illusion where it appears that your hand has a hole in it. You'll see the results from when one eye gets conflicting information.

This science activity demonstrates the dominant eye phenomena. What does your brain do when it sees two images that conflict?

In this activity, learners conduct a simple test to find their blind spot.

In this quick activity, learners practice locating a constellation in a map of very dark skies.

In this optics activity, learners use paint thinner to make a small jar seem to disappear inside a larger jar.

In this demonstration (18th on the page), learners conduct a simple test to explore how the cornea refracts light, which is further bent by the eye lens through a process known as accommodation.

In this activity, learners create a "mini sky" in a glass of water in a dark room.

In this activity about scale, learners investigate the world of the very small by cutting a 28 centimeter strip of paper in half as many times as they can.

In this quick activity, learners observe how the added sugar in a can of soda affects its density and thus, its ability to float in water.

Use this hands-on activity to demonstrate infrared and thermal radiation.