I think most states have a minimum pull on bows for big game/deer. I think here in IL is may be 40lbs. a modern 40# compound can do more than probably a 60 or 70# recurve, more velocity/energy. I'd just stick to those minimums, if a son or daughter can pull that legal requirement comfortably, do it up! If not, waiting a couple years til they can, its part of being a kid, when you're bigger.....haha. I tell you my attitude on hunting being a man vs a boy has changed quite a bit, not so much attitude, but outlook. Maybe it's wisdom, strength, mental toughness, put it all together, I just feel like I've taken a huge step forward in my hunting skills than I have just a few years ago, and hopefully I'll continue to take steps forward, though I suspect they won't be as large of steps. I think alot of times kids are pushed to hunt too aggressively or too quickly, a nudge I think is ok, or some hellpe, but when a kid's scared to death to shoot that .270 cause of the kick, he either needs a smaller caliber, or a few more years under his belt til he's ready.