Today there are newer materials, especially plastics, cements, and acrylic paints. Hobby shops, toy stores, and handicraft shops sell kits for making model automobiles, airplanes, ships, rockets, engines, animals, birds, plants, robots, and countless other items. A commercial kit usually includes all the parts necessary to make the model with the exception of cement and tools. Polystyrene cement is usually recommended for gluing. Often the object is molded in the proper color, and decals are provided for decoration.
Little painting is then necessary.
The few tools required are inexpensive. Often the parts will fit together without the use of any tools. The authenticity of commercial kits is very accurate because their design is based on actual blueprints of the real object. Parts are precast and designed to fit together perfectly. The development of small motors has done much to increase interest in working models, or scale models that move.