2. An educational toy as claimed in claim 1, wherein the labels of the second set of keys are illuminated by a common lamp energized at the end of the said predetermined length of time.
1. An educational toy which comprises a first set of windows and a second set of windows, a first set of keys selectively operable to cause one of a plurality of first images to be displayed in the respective one of the windows in the first set and to cause a simultaneous display of an associated one of a plurality of second images in the second set of windows for a predetermined length of time, a second set of keys, each having as a label a respective one of said second images and selectively operable at the end of the said predetermined length of time, and means for indicating correspondence and non-correspondence between the label of the selected key of the second set and the image displayed in the window of the said first set.