The problem has always been with creatine the amount of water you need to ingest just to keep from developing some serious kidney problems when you take the stuff (look it up). I'm not too sure I would trust a kid to to pick-up his dirty socks as much as managing to drink gallons of water everyday.
Years ago there was some study done in Texas that found something like 80% of D-I high school football players were juicing. I'm sure it's alive and well in hockey here in N.E. The point being maybe this helps to open a pandora's box if you start them so early. I'd say at least nothing from the standard diet until the kid's balls drop.