Charlie and the Chocolate Factory (musical) the Teavees board the S.S. Wonka, a bathtub-shaped boat, and travel through an underground river deep below the factory. Charlie and Grandpa Joe, who were too slow to catch the boat, are forced to swim behind them wearing scuba helmets. Wonka leads them into the TV room, much to Mike's delight. Wonka demonstrates Chocolate Television, which uses a machine to send chocolate bars to TV screens. Mike's obsession with electronics overcomes him and, despite his mother and Wonka's protests, he uses the machine to teleport himself into a television set. However, they cannot locate him on the usual channel, so
Willy Wonka & the Chocolate Factory to buy the rights to the book and finance the picture for the purpose of promoting a new Quaker Oats "Wonka Bar". David L. Wolper and Roald Dahl agreed that the film would be a children's musical, and that Dahl himself would write the screenplay. However, Wolper changed the title to "Willy Wonka and the Chocolate Factory". Screenwriter David Seltzer conceived a gimmick exclusively for the film that had Wonka quoting numerous literary sources, such as Arthur O'Shaughnessy's "Ode", Oscar Wilde's "The Importance of Being Earnest", Samuel Taylor Coleridge's "The Rime of the Ancient Mariner" and William Shakespeare's "The Merchant