We have our Junior (6 years) given the modular for Christmas and he had no problems to build even the most complex models of the kit with the manual (in this case a book) itself on. His enthusiasm for the Fischtechnik parts has thus his parents great pleasure. Compared to eg Lego Technic (there is often only 1-2 models) are here with a modular equal to a number of variants to build (about 40 models). The entire kit is also the basis for enhancements that will soon be pending with us: light / motor / Sound Modules can be delightful additions.