Age: Preschool-1st grade
Animals: penguins

Penguins are always polite, the narrator says, but is rudely refuted by the devious actions of one Polly Penguin. When everyone else starts acting loud like Polly, baby Peter becomes frightened until considerate and protective Polly starts to be polite again.

An interesting manners book that uses an older sister's compassionate concern for her little brother in order to act more respectable.