Optical toy

Wiktionary Word definitions in Wiktionary
n. An early animation device consisting of a disc or drum which rotated, showing successive images through slits, often via a mirror, thus producing the illusion of motion.

Wikipedia Word definitions in Wikipedia
The phénakisticope was the first widespread animation device that created a fluent illusion of motion. The phénakisticope is regarded as one of the first forms of moving media entertainment that paved the way for the future motion picture and film industry. ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Phenakistoscope \Phen`a*kis"to*scope\, n. [Gr. ? a deceiver + -scope.] A revolving disk on which figures drawn in different relative attitudes are seen successively, so as to produce the appearance of an object in actual motion, as an animal leaping, etc., ...