Ravensburger has been making high-quality puzzles since 1891. Thanks to Easy Click technology, the plastic pieces of this 3D puzzle fit together perfectly to create a solid sphere, no glue required. It can be completed the usual way by looking at the picture, or as each piece is numbered on the back, you can also follow the numbers for those more challenging areas! A plastic rotating piece also allows you to move it like a globe. Discover the world, one piece at a time! Ages 12 and up. Contains 540 pieces. Finished puzzle size: 22 cm diameter.