The Mould King boxer engine building kit from the Engines series offers technology enthusiasts a challenging building experience. With 609 precise building blocks, you can construct a detailed replica of a classic boxer engine. The model impresses with functional, movable components such as a rotating flywheel and a working fan wheel driven by belts. Striking chromed elements on the intake pipes and exhaust give the mechanical model an authentic look. This building kit is ideal for collectors and playfully promotes an understanding of complex mechanical processes.