This website from the Exploratorium provides an activity on building a Zoetrope, a device that produces an illusion of action from a rapid succession of still pictures. The site contains written instructions and video...

This website from eChalk contains optical illusions offering proof that our color perception is strongly influenced by surrounding colors. The site also includes educational games related to optical illusions and color.

This site from the Exploratorium contains an activity to demonstrate fatigue of the eyes’ motion detectors and the resulting visual illusions. A spiral disk is rotated as the participant stares at it for a few seconds;...

This site contains a set of optical illusions. These illusions are designed to show the user the biases and perception tricks their minds play on them while looking at different pictures. The different resources are...