Coaches card and back ground check. When I was in college, before I was married and long before I had kids of my own, I spent three Kids' seasons as a volunteer coach for the local club. I did it because I loved the sport, and I wanted to help young kids learn and love the sport. No back ground check was required, and no Bronze card was required to coach all the way through the end of the season.
Granted that was in the late '80s, and times have changed since then. We now live in a sterilized society because there are bad apples among us, and by not protecting ourselves (liability wise), we create these defensive barriers so we don't get sued. It is unfortunate that we have to defend ourselves because of a few, or many, bad apples.