Although cartoon versions of this puzzle sometimes appear in children's puzzle magazines, these puzzles can challenge adults just as readily as kids! The player is asked to find identical pairs of images, which as can be seen in these samples can be made much harder by rotating (or even reflecting) the images.
The more pairs there are, and the more similar they are, the harder the puzzle. Colour usually makes the puzzles easier rather than harder since it helps the eye keep track of the shapes.
