More of a measure of how well they (or their parents) listen to me (or their parents). I'm the one explaining to both the parents and children at the end of the hunt, because I'm always curious who found them. The parents might re-enforce what I said, and yes I have seen a parent take a silver quarter and spend it in a soda machine (never bothered to ask why)....ultimately the children decide to spend the dime as $0.10 or save/sell it for the ~$0.50 in silver.
