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    The Exploratorium
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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. Learners will use Benham's...

    $1 - $5 per student Ages 8 - 18 10 to 30 minutes
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    University of Washington
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    In this activity, learners make a Benham Top to explore visual illusions and optics. This activity guide includes three different instructions for making the spinner using various recycled...

    $1 - $5 per student Ages 8 - 18 30 to 45 minutes
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    University of Washington
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    In this activity, learners investigate visual perception as well as plan and conduct their own experiments. In "CLASS EXPERIMENT," learners discover how depth perception works by testing...

    1 cent - $1 per group Ages 8 - 18 1 to 2 hours
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    Community Science Workshop Network
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    In this activity, learners build inexpensive kaleidoscopes using transparency paper and foil (instead of mirrors). Use this activity to introduce learners to concepts related to optics, light,...

    $1 - $5 per student Ages 8 - 14 10 to 30 minutes
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    Community Science Workshop Network
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    In this activity, learners construct three optical illusion toys to examine how our brains play tricks on what we see. Learners use simple materials to build a Circle Spinner, Thaumatrope, and...

    $1 - $5 per student Ages 6 - 18 30 to 45 minutes

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