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Thaumatrope Illusion
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Design and create an optical illusion toy that makes two pictures appear to become one. This is called a thaumatrope and will allow the learner to investigate the phenomenon of persistence of vision.
Benham's Disk
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In this activity, learners make a Benham Top to explore visual illusions and optics.
Seeing in the Dark
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In this activity (17th on the page), learners investigate why you cannot see colors in dim light.