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In this activity, learners create a simple “top” from a CD, marble and bottle cap, and use it as a spinning platform for a variety of illusion-generating patterns.

In this activity, learners investigate color vision as well as plan and conduct their own experiments.

In this activity (12th on the page), learners investigate their ability to discriminate (see) different colors.

In this activity, learners investigate the sense of sight and develop and conduct their own experiments.

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 activity, learners investigate visual perception as well as plan and conduct their own experiments.

In this activity, learners make a Benham Top to explore visual illusions and optics.

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