You posted this while I was slowly typing my response. Wyatt is almost exactly 6 months older. Like I said above.......
I teach archery as part of my PE classes and we use the Genesis bows by Mathews. They are adjustable from 10-20 lbs and are fairly reasonably priced and the students sure enjoy shooting them.
Thanks for the post man and congrats on your son's improvement. You may have just sold a Martin Tiger bow as well because it looks like the perfect bow for my son next year when he gets a little bigger.
I know its way early to think of eye dominince, but I was thinking the same as you with my left handed son. It turns out he is right eye dominant and can use all of my weapons as he shoots right handed. It wouldn't be that big of a deal but for example most of my guns have the push thru-bolt-style safety set for a right hander.