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In this optics activity, learners conduct an experiment to find out why two eyes are better than one!

free Ages 6 - 11 10 to 30 minutes
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In this activity, learners investigate visual perception as well as plan and conduct their own experiments.

1 cent - $1 per group Ages 8 - 18 1 to 2 hours
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In this easy demonstration (3rd on the page), learners explore depth perception by conducting a test with two pencils.

free Ages 4 - 18 Under 5 minutes
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In this activity, learners use a simple trick of perspective to dress friends in tiny cutout clothing. Learners make tiny pants out of card stock and tape them to the end of a stick.

1 cent - $1 per group Ages 6 - 18 5 to 10 minutes