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Thaumatropes
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In this activity, learners will make a thaumatrope, an old-fashioned optical illusion that dates back to the 1820s.
Spinning Cylinder: Make a triangle appear on a spinning wheel
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Spin a short piece of PVC pipe that's been marked up, and watch a triangle appear. Enjoy this optical illusion from the Exploratorium's Science Snack series.
Special Effects: Titanic and Beyond
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In this activity, learners investigate how geometry plays a role in perspective.