Wooden 15-puzzle, perfect as an educational toy. - Material: Wood - Type: Sliding Puzzle - Design: 15-Puzzle with numbered tiles - Storage: Wooden frame with lid 【How to Play】 The way to play the puzzle is to remove the marked piece and use the empty space to move the 15 pieces up, down, left, and right, arranging them as shown in the diagram above. Also, let's try to arrange them so that the sum of the vertical, horizontal, and diagonal numbers equals 30. Let's have fun discovering other difficult arrangements. 【Features】 The natural wood texture and warmth may have a positive impact on children's sensibilities. Thank you for viewing. This item was found at my parents' house. The contents are clean, but the box has scratches and stains. For those who understand that this is a used item (no pets, no smokers), thank you very much. m(_ _)m