We have given the modular our son to their 6th birthday and are sadly disappointed. The fit is unfortunately very often not satisfactory, which discouraged the small handicraftsmen and leaves no fun building emerge. Even with Dad's help, some models do not satisfactorily establish. My son is a huge Legofan and builds enthusiasm both on presentation, as well as to their own ideas. This building experience does not come on at HEROS. The assembly instructions are very complicated design (even for adults !!) making recreating seeehhhrr lengthy and so the pleasure is quickly lost ... A PITY!!! No purchase recommendation!