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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 discover that the human brain is highly adaptable. Learners try to toss beanbags at a target while wearing prism goggles.

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

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

In this activity, learners investigate procedural memory.

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.

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 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.