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In this activity, learners explore their eye pupils and how they change.

free Ages 8 - 14 10 to 30 minutes
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In this activity, learners control the (apparent) size of a hole with their brain.

1 cent - $1 per student Ages 11 - 18 5 to 10 minutes
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In this quick and simple activity about reflexes (at the top of the webpage), learners conduct a simple test to explore pupillary response.

free Ages 8 - 18 Under 5 minutes