history: I was out shopping with my four year old son. He was being very polite to people, saying "bless you" when they sneezed, please and thank you, have a nice day, etc. People seemed really proud.
current: Me and my four year old were grocery shopping. He was saying all sorts of cute things to people and being very polite. People were really amused by him it seemed. 
next: Kids are really cute at that age.  Embrace the cuteness while you still can!