You assemble this construction kit by pressing the parts out of the pre-punched construction plates according to the numbering in the supplied construction drawing and clamping them together. This creates a sturdy construction for Bouwdervoort. So no glue or the like is required during construction. Only the smallest parts sometimes need a drop of glue to stay firmly attached. Dimensions (l x w x h, in cm.):30.0x27, 5x5.0 Number of parts: 26 Difficulty: Medium Construction time: 30-45 minutes All wooden building kits from Kitcreatives are made of higher quality FSC-certified wood.