When a group of animals goes to Penguin's house for dinner,
their manners are atrocious until they're told about rules of good behavior.
There's a "That's right/That's wrong" refrain throughout.

For example: “When a hippo sits down for dinner, she should put her napkin on her head.
How pretty! Is that right? No, that’s wrong. When a hippo sits down for dinner,
she should lay her napkin on her lap. That’s better!”