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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 create a cylindrical mirror to see themselves as others see them.

In this activity, learners construct a three-dimensional ambiguous cube to explore visual illusions and how our brains interpret or misinterpret information.

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

In this activity about light and perception, learners create and observe moire patterns.

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