Melissa & Doug 1,000-Piece Knock Knock Doorways Jigsaw Puzzle (29 x 23 inches) Durable cardboard jigsaw puzzle featuring dozens of colorful doors 1000 pieces; every piece is uniquely shaped Higher piece count presents a bigger challenge Measures 29 x 23 inches (74 x 48 cm) when assembled Promotes hand-eye coordination, fine motor skills, and problem-solving skills