I can appreciate your concern about the sort of weirdness that comes up when anybody thinks or talks about guns.
The very first day my boy went to pre-school, he came back and asked, "daddy, do you have a gun?". It seems that all the boys were talking about guns and maybe their obsession with the subject was a little less than healthy.
My answer to the question was: "Yes. I do own a gun. Do you know what to do when you see a gun?"
My first firearms teaching moment with my 3-year-old son. The answer was this:
1) don't touch it.
2) tell a grown-up.
Guns are a fact of life. I think we can best serve our children by not being stupid about the facts.