Cafe Wall Illusion

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In this fun and interactive online exhibit, the straight lines of a tile wall appear to curve. The learner moves the rows of tiles and changes the color of the grout to achieve the intriguing effect. Although the exhibit requires a computer, the concept can be adapted into a longer, hands-on exploration of optical illusions.

Quick Guide

Preparation Time:
Under 5 minutes

Learning Time:
5 to 10 minutes

Estimated Materials Cost:
free per student

Age Range:
Ages 4 - 18

Resource Types:
Activity, Exhibit


Materials List (per student)

  • a computer with Internet access and Adobe Shockwave Player


  • Life Sciences
    • Human Senses and Perception
      • Vision
      • Perception


To use this activity, learners need to:

  • see
  • see color
  • use mouse

Learning styles supported:

  • Involves hands-on or lab activities


This resource is part of:

Access Rights:

  • Free access