Knock knock--who's there.With this delightful 1000-piece cardboard jigsaw puzzle, you'll enjoy exploring dozens of doors of all shapes and colours! The high piece count makes for a more challenging puzzle experience--great for adults as well as children ages 12 and up.Melissa & Doug cardboard jigsaw puzzles are made using durable, high-quality materials.The sturdy pieces--each uniquely shaped--resist peeling, fading, and creasing, so the stunning high-gloss artwork will stay looking great for years to come!