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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 build inexpensive kaleidoscopes using transparency paper and foil (instead of mirrors).

In this activity, learners construct a device that allows them to look over ledges or around corners.

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 make a Benham Top to explore visual illusions and optics.

In this activity, learners make an optical illusion toy from the 1800s to explore persistence of vision.

In this optics activity, learners build a spy tool to secretly view things over walls or around corners.