6 sets : « Letters », « Animals », Geometrical shapes », « Objects », Symbols », « Stars »

• The "Geometric figures" set is the easiest to play because the tiles are symmetrical (the tiles of each pair are visually similar for both players), but of very distinct shapes.

• The "Stars" set is composed of symmetric tiles, but which are very similar to each others

• The "Animals", "Symbols," "Letters" and "Objects" sets are composed of distinctive tiles, but the tiles of each pair are arranged "head to tail." Therefore, the games using these sets require good spatial representation skills.