Cool stuff man...
my youngest boy is 3 also,and he's been shootin since he was 2..all I have to do is load the arrow and he does all the rest. Its fun to watch him shoot,he draws with no hesitation and yanks it back like a warbow shooter back past his ear. He draws it further than his older 6 year old sister. Its fun watching the wee lil ones try n shoot n figure it out.
Looks like he's got lots of room to grow into that one.