Originally a book, made into two movies. The most recent one (starring Johnny Depp) is way off, but still pretty awesome and funny. It explains the history of Willy Wonka and has a better ending.
The book was full of imagination, candy, dreams and chocolate. It was missing stomach aches, cavities, and diabetes though.
But in all the movies may just be a selfless promotion for Wonka candy such as nerds, sweet Tarts, etc.
"Everything in this room is eatable, even I'm eatable. But that is called cannibalism, my dear children, and is in fact frowned upon in many societies." -Willy Wonka (In the new movie 2005)