Fix that by taking him shooting yourself.
They live in Oklahoma and I live in NW Florida. The last time they visited, I let him shoot a Daisy springer barrel cocker. It was made in Spain and is light and handy, Accurate too. It has a scope.
I set up a single can on top of an old brick and had him shoot. He had trouble holding the barrel up so I let him rest it on the handle of a lawn mower. Of course that would be a little detrimental to accuracy but we are not talking about minute of angle here.
He hit the can his first shot which made me happy. Actually he just barely did but it was enough, the can went spinning with two holes in it.
His Father cocked the gun for him and loaded it. Thorne was really really enjoying it but in a quiet serious way. He improved and eventually began hitting the cans somewhere near the center.
Now that particular gun was highly accurate but only shot around 650-700 fps. Still that is enough to be dangerous. It will put a hole through both sides of an insecticide can.
When they left he took it home with him but I am afraid he has never fired it again and I know he wants to.