I take care of my nearly 3 yo DGD 5 days a week, and have since she came home from the NICU. Her parents and I have taught her to call neighbors and friends "Miss ----" or "Mr. ----" because I am not big on hearing a child call my 60 year old friends by their first names. She says please and thank you and excuse me very naturally. I do get a lot of nice comments when I am out in public with her. It takes work to teach manners, but frankly it's not that hard if it's something you value.