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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 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 (26th on the page), learners construct an easy-to-build device and test motor learning.

In this activity, learners will make a thaumatrope, an old-fashioned optical illusion that dates back to the 1820s.