Perfectly polite penguins

Penguins are always polite. They say "please" and "thank you," they wait their turn patiently, and they always help to clean up when playtime is over. But one day, Polly Penguin decides that being polite is boring. So she interrupts when others are talking, refuses to clean up, and makes a mess at the dinner table. Soon, all of the penguins copy Polly and lose their good manners, too! Can Polly help make things right again?