Happy feet: A penguin named Mumble who can't sing, but can dance up a storm. Mumble feels the beat and can't stop dancing. Unfortunately, emperor penguins are all about finding their own heart song, and the dancing youngster--as cute as he is--is a misfit. Luckily, he bumps into little blue penguins and a Spanish-infused group and begins a series of adventures.

Happy feet two: When Mumble's son Erik wants to be a singer instead of a dancer like his father, they have a falling out until a problem that threatens the entire penguin colony brings them together.