10. An educational toy which includes a display panel and an image carrier movable relative to the display panel, wherein the image carrier is formed with a plurality of sections each having a first image, a second image associated with the first image, and a plurality of third images of which only one corresponds to the second image and wherein the display panel is arranged to display the images on the image carrier section by section and includes a first window area for displaying the first image, a second window area for displaying the second image, a third window area for displaying the said plurality of third images and a plurality of keys each associated with a respective one of the plurality of third images and arranged to be depressed by the user to test for correct assimilation of the information in the images, means being provided for indicating correspondence between the image associated with the selected key and the said second image.
10. An educational toy which includes a display panel and an image carrier movable relative to the display panel, wherein the image carrier is formed with a plurality of sections each having a first image, a second image associated with the first image, and a plurality of third images of which only one corresponds to the second image and wherein the display panel is arranged to display the images on the image carrier section by section and includes a first window area for displaying the first image, a second window area for displaying the second image, a third window area for displaying the said plurality of third images and a plurality of keys each associated with a respective one of the plurality of third images and arranged to be depressed by the user to test for correct assimilation of the information in the images, means being provided for indicating correspondence between the image associated with the selected key and the said second image. 14. An educational toy as claimed in claim 10, wherein the film carrier is formed of an insulating material and is arranged to pass between contacts associated with the said keys and is provided with an aperture only alongside the third image corresponding to the second image whereby only the contacts of the key associated with the correct one of the third images may be brought together upon manual actuation of the associated key.