I say let a kid shoot whatever legal animal they can/want to. My first deer was the third I saw on my youth day hunt when I was 12. The first two saw me move and ran off. It was 81 lb button buck with a belly full of corn at 7:45 am. You always remember your first, regardless of what it is. My second, at 14, was a 4 point that dressed out at 130lbs. Those are the deer that mean the most. I think with the few numbers of kids actually getting into hunting, we shouldn't be limiting them. So what if a kid gets a Booner on their first try. So what if in the beginning, they're more about antlers than the joy of being in the woods, or hunting for meat. That'll come with time. But it's far more important to get them hunting. Just my take on it.