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In this activity, learners investigate visual perception as well as plan and conduct their own experiments.

These two activities (4th on the page) demonstrate the importance of two eyes in judging depth.

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.

Closing one eye eliminates one of the clues that your brain uses to judge depth. Trying to perform a simple task with one eye closed demonstrates how much you rely on your depth perception.