Subcompacts were long relegated as first cars for first-time drivers. They were the cheap family hand-me-down for Junior until he could prove his mettle behind the wheel before being entrusted with the keys to a “grown-up” vehicle. How times have changed. Today such entry-level vehicles are offering an unabashedly charming version of fun and frugal that Junior probably doesn’t want to drive what the parents are tooling around town in. How exciting can a grown-up’s car be anyway? Enter the 2013 Mazda2, Zoom-Zoom in its most concentrated form.