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In this activity, learners construct a device that allows them to view 2-D images in 3-D.

In this activity, learners investigate parallax, a method used to measure distances to stars and planets in the solar system.

Which one of your eyes are dominant? Do they act independently or are they equally "in control?" This activity explores how your eyes work (or don't work) together.

In this activity (16th on the page), learners play a variation of the "I Spy" game to explore color. Learners work in teams with each team assigned a color.

In this optics activity, learners build an animation tool to make mini movies. When you spin a phenakistascope, the pictures move so quickly that your eyes and brain can't separate the images.

In this activity, learners construct three optical illusion toys to examine how our brains play tricks on what we see.

In this easy demonstration (3rd on the page), learners explore depth perception by conducting a test with two pencils.

In this activity (17th on the page), learners investigate why you cannot see colors in dim light.

In this fun optics activity, learners explore principles of light, reflection (mirrors), and perception. Learners work in pairs and sit on opposite sides of a "two-way" mirror.