Model in bottle hobby kit

A bottle with a flat bottom or side surface and a relatively small neck has a model structure of preformed parts to be assembled in the bottle. The model structure has a base of upper and lower layers, each layer being made up of narrow parallel elements, the elements of the upper layer crossing the elements of the lower layer and interlocking therewith, the assembled base jamming within the bottle on its flat surface. Upstanding elements of the model structure are forced into apertures in the upper layer of the base. The model is assembled on the base from interlocking parts. The elements of the base and the parts of the model are small enough in two dimensions to be inserted through the bottle neck for assembly therein.