British funnyman John Cleese has given up acting to teach youngsters the art of comedy. The bumbling FAWLTY TOWERS and MONTY PYTHON star hopes his glittering career in comedy will inspire kids to crack jokes. The 66-year-old has set up a series of masterclasses, which will see him act as "comedy professor", sharing his insights with students. He also plans to pen a book on the history of the genre. Cleese says, "I'm too tired to write new comedy. I can never do better than Fawlty Towers whatever I do. "Now I very much want to teach young talent some rules of the game. "I also want to write a book which is the history of comedy. It will cover the greats of silent cinema to Ricky Gervais, who is the height of modern entertainment."