Detailed Description A great introduction to logic and reasoning skills, this three-piece puzzle and matching game develops the ability to identify and sort different sizes, as well as to organize them into groups according to category. Since the puzzle pieces are interlocking, the game is self-correcting. This is also an excellent tool for teaching and reinforcing generalization skills, as the three sized objects depicted are all slightly different. For example, the pieces with dogs show three different kinds of dogs, thereby illustrating size as well as category.