My Little Man has all sorts of books from travel, art, things that go 'vroom,' to things that go 'moo.' One of the things that has been missing from this collection is an etiquette book and I don't think he would take to well to an Emily Post book --unless he used it to reach the chocolates on the kitchen counter.
I recently found this really cool book, Mind Your Manners, B.B. Wolf by Judy Sierra, while browsing in a local children's store. Turns out the Big Bad Wolf has retired and left his sinister life behind. It is a really neat book with lots humor for the adults reading it and cool colorful drawings. I give it 4 sleepy bears out of 5. Get a copy through my Amazon link (it is free to use the link).
Wise words to live by -no matter the age.