New vocabulary word: Role Model.
Children require living up to.
Kids are a good mirror.
When my nephews were 4 or 5, they were in a phase where offending people with dirty words was cool, and they turned to me as the cool uncle to teach them.
So I told them I would teach them the absolute worse word that they should never tell anyone.... "crumpo". They bought it and I heard it whispered furtively under their breath with snickers several times.
I was smart enough to let my sister in on the joke so she could react appropriately when they said this horrible thing. It seemed to distract them from the "lesser" swears.