A Stacker for the Stages - with more developmental benefits Children are initially challenged to fine-tune motor skills by placing the easy to hold rings on extra thick stacking pole. With that mastered the child begins to enhance spatial logic by interlocking anyone puzzle piece to any other; in any order. At this point, there is no wrong answer! Finally, through "solving" the puzzle sequence the child learns color and size recognition. Premium Quality Construction! The stacker pole is thicker than average stackers making the stacker more durable while reducing poking hazards. Each puzzle pieces is cut from a single piece of wood, reducing the possibility of breakage. With its playful challenges through multiple stages of development and its premium quality wood constructions the P'kolino Puzzle Stacker is likely to be a classic for the ages. P'kolino products meet or exceed US, EU, and Canadian safety standards. Product Made in China.