My first gun was an H&R 410 that I got when I was 7. I shot it every weekend, at game during hunting season and blackbirds and whatever else I could find off-season. I think a 410, especially in single shot, teaches you to make your shot count and where to put that shot. When I was 10 I got a .20 ga. 1100. Didn't like it and went back to a 410 870. Still use a 410 Rem 11-48 for doves ( I'm 40).
"Suppose you were an idiot, and suppose you were a member of Congress, but I repeat myself." Mark Twain