Just when you thought BMW couldn't make a smaller car, I mean the 1 Series is pretty darn tiny, here comes the newest entry-level single seat Bimmer roadster.  Powered by the revolutionary toddler walk drive train pumping an impressive 1-baby power, the BMW Baby Racer II Motorsport is constructed of light-weight composites and is equipped with real rubber tires, a speedometer and a tach in the cockpit.   And, since the guys and gals who drive the current line-up of BMWs rarely employ the brakes anyway, the automaker decided to just leave them off this exciting new model.  Although anyone…