Dr. Seuss wrote a large number of children's books, having a successful career, but was never too afraid include serious messages in his books - always making sure children had something to think about after they finished their stories. Horton Hears A Who was a great story that taught children not to fear people different than themselves, for example. The Lorax, for those who haven't read the thin little book, is about the dangers of commercialism destroying our natural habitat.
The film based on the book, however, tries to show that theme, but is generally too busy making jokes and....