It may look simple, but this challenging wooden puzzle has numbered tiles that must be arranged to give the same total in each row. Think of it as exercise for your mind. A hexagonal wood puzzle with 19 hexagonal tiles, numbered from 1-19. Your task: to arrange the tiles so every row - whether 3, 4, or 5 tiles long - adds up to 38. There are several solutions, and arriving at any of them is guaranteed to keep your synapses firing. Comes with a wood tray. Dimensions: 6" x 6" x 3.5".