When it comes to kid's bows, my philosophy has always been... not too long and not too heavy. Try to keep the bow proportioned to the kid, and too much draw weight just turns kids off. If they can't shoot it comfortably, and hit the target sometimes, it's not fun and they lose interest. A 6' longbow for almost any kid is just too unmanageable. I'd keep the draw weight <30# as well.