I exposed my kids to guns from the moment they were born. When I had them out cleaning them, they would "help" me clean them.
It took all the curiosity out of it, they were not and are not interested in showing off or telling their friends about guns.
To them they are just routine items around the house just like furniture or anything else.
Same thing my dad did with me and that I do with mine now. Eliminate the curiosity and increase respect and safety for firearms.