Ravensburger makes the world's highest quality puzzles! All Ravensburger puzzles are made from the highest quality and thickest green Kappa cardboard available. They use the finest structured paper so the pieces last and have a nice matted finish which makes them easy to see and handle. Last but not least, their puzzles are cut with hand-made dyes to ensure that all pieces are fully interlocking, and their strong, durable boxes last a lifetime! Once you do a Ravensburger puzzle, you will not go back to another brand! 8+