I wanted to ask some of you about the helmets you are putting your kids in. My boy just started to actually ride harder this year and it has got me thinking about helmets. Right now he just wears a cheap DOT helmet. The 6D concept really makes a lot of sense to me, but it is a large chunk of change to put down. If that cost is spread out over a few years, it doesn't seem so bad. In your experience (on average), how many seasons could I expect my 5 year old to get out of a new helmet?