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Can you deceive your eyes? When your eyes work normally, you see a nice 3 dimensional picture, but what happens when each eye sees something different? Grab a friend because this Exploratorium produced activity will have you seeing new things!

Quick Guide

Preparation Time:
Under 5 minutes

Learning Time:
Under 5 minutes

Estimated Materials Cost:
free per student

Age Range:
Ages 4 - adult

Resource Type:


Materials List (per student)

  • White wall or other white surface (white poster board works well)
  • Handheld mirror, approximately 4–6 inches (10–15 centimers) on a side
  • A partner


  • Life Sciences
    • Human Body
      • The Brain and Nervous System
    • Human Senses and Perception
      • Vision
      • Perception


This resource is part of:

Access Rights:

  • Free access