The Ravensburger 3D puzzle uses unique "Easy Click" technology and high-quality plastic hinges that fit together and do not require gluing. The backs of the puzzles are numbered, allowing the model to be assembled by numbers and eyes. The effective 3D model stays firmly together and can be disassembled and reassembled repeatedly. The set includes 216 plastic puzzle pieces and a base plate with a picture, on which you can attach the building for display. Use as a bright decoration or as an LED light, for example, as a night light. Requires 3x AAA batteries (not included).