Help children build confidence and achieve success with fun, three-piece puzzles that hone their skills at their own pace. Only matching pieces fit together so children can learn by trial and error. Teach sequencing and ordinal numbers. Durable, 3" x 3" pieces feature pictures on front and words and numbers on back. The 15 two-sided puzzles come in a sturdy storage box. Fun-to-Know Puzzle is ideal for teaching ages 4 and up.