Awesome kid of yours, glad you let him hunt with an anathema bow. When he can comfortably and accurately shot a real bow then it is time to make a ceremony of getting rid of the training wheels. Go ahead a make a bit of a big deal over it, kinda like saying "now you have arrived-you are a man". I think our western culture has no real graduation ceremony where boys are told they have now crossed the line into manhood, consequently too many act like 12 year olds all their lives. I have a feeling he will gladly take up the responsibility of manhood in order to get the privileges that do with it, he sounds like a rock solid guy already!