Beretta 92FS' are easy for kids to shoot. Accurate, and can be used in just about any pistol competition out there.
Many say its too big, but not from what I've seen. I moved up all my grandkids, some from the age of 8, to the Beretta and haven't had any problems.
You should try to find one to rent or barrow, let him try it, I think he'll like it. Then you can be like me, having all the kids and grandkids fighting over it.
CPT USAR Ret
USAMU Sniper School Oct '78
Distinguished Rifle Badge 1071