I fell off the bike as a kid and hit my head several times (you may argue it shows and I wouldn't argue back), but I bought my first helmet when I started mountain biking, I wasn't even wearing it while commuting. Nobody pointed that out to me, ever. Same thing while skiing, the few 'geeks' that were wearing an helmet were either frown upon or laughed at. I know better now and always wear my helmet (I only forgot, twice on the same day, at NICA track building of all places and I was soon yelled at) but it still doesn't come natural to me. I think kids should be 'conditioned' to wear helmets from the beginning so they don't even have to think about wearing it, they would just do it.