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X-Ray Vision?

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In this activity (13th on the page), learners complete a simple illusion trick to see through their own hand.
1 cent - $1 per group Ages 8 - 18 Under 5 minutes

Benham's Disk

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In this activity, learners make a Benham Top to explore visual illusions and optics.
$1 - $5 per student Ages 8 - 18 30 to 45 minutes