Im fine with kids playing up.Its been clear at ages 11 and 12 that the gap between the biggest and smallest kids is pretty large anyway so as long as they can physically handle it then why not.Plenty of JDL 12 kids playing NPL 13's too and from all reports the good ones are handling it just fine.There might be a time soon when those kids will stay back for the extra year of development but hopefully coaches/parents make decisions based on the best interests of the kids and they will be fine.