How to teach them how to shoot? Which eye? What handed? Just let him pick it up and pull. He will do it right for him
I made a pair of bows for my friends twin daughters when they were 9. One of the most statisfying things I ever did. One of them is a pure number crunching mathematic genius now and other is a proper tom boy...nature versus nurture...I've since made the tom boy one another bow, osage and it pulls 43#@26. She shoots it like a boss!
Anything that gets children interested in proper things is to be commended.