The Large Shapes Jumbo Knob Puzzle is a large knobbed, wood puzzle designed for use by children with fine motor, grasping, neurological, or upper extremity disabilities. This eight-piece puzzle teaches eight basic shapes (triangle, square, circle, oval, diamond, pentagon, octagon, and rectangle). The name of the shape is printed on each piece. The extra-thick wooden puzzle includes jumbo wooden knobs on each piece for easy grasping. Full-color, matching pictures appear underneath each piece. This puzzle encourages eye-hand, fine motor, and visual perception skills. DIMENSIONS(LxWxH): 15.5 x 12 x 1.5 inches. WEIGHT: 2.6 pounds.