Katamino is not just one puzzle, it's 500 puzzles, with thousands of solutions. Nor is it just a puzzle, it's a game so popular that they play it on European television. Katamino is an addictive game that builds spatial observation skills, sharpens logical thinking, and teaches basic properties of 2D and 3D modeling. Plus, the colorful wooden pieces look cool on your coffee table. The set includes a notched and numbered playing board (12½ ? 7½ inches), a movable space bar, and twelve playing pieces.