My son started wrestling when he was in the 6U age group. His first year he wrestled a couple novice tournaments. His second year he wrestled a couple novice tournaments and then went to open tournaments. We quickly noticed that with a very few (1 or 2) exceptions, he was wrestling the same kids in the open tournaments as he was in the novice tournaments. His record at the open tournaments was about the same as novice tournaments, so we did not wrestle anymore novice tournaments once he moved to open events.

I don't know how you could set hard and fast rules on the development of a child's athlete ability. Each child starts at a different level and progresses at a different rate. It's up to the parents and coaches to determine when a wrestler is ready to move up. If a parent or coach take an experienced wrestler to novice tournaments to get wins at the expense of lesser competition, no one benefits. Not the wrestler getting the easy wins, and certainly not the novice wrestler on the wrong end of the "experience".