The Jumbo Knobbed Puzzles are wood puzzles designed for use by children with fine motor, cognitivr, perceptual, neurological, or vision disabilities. Each four puzzle has a puzzle board with a picture in the insert that matches the corresponding piece. Each piece has a wooden knob for ease in grasping. Available puzzles (each sold separately) include farm animals, vehicles, first toys, and baby pets. DIMENSIONS: Each puzzle is 20 inches long.