In Japan, Kato makes a version of N scale trains for kids and collectors called the "Pocket Line" Most of the cars and locos have 2 axles and are shortened-scale and have less detail, but can run on regular N scale track: So how about this compromise: We should have two tiers of N scale: toy trains and model railroads. Toy train N scale can have 9 3/4" radius and truck mounted rapido couplers. Model Railroad N scale will have 12" radius minimum, and body-mounted uniform knuckle couplers. Both trains will be able to run on the same N-scale track, though the toy trains can only run on code 80. That way, the beginners will be happy and the serious modelers will be happy!