Charlie and the Chocolate Factory (musical) Gobstopper. Grandpa Joe is furious at Wonka giving his grandson a "measly Gobstopper," and the two quickly begin to fight. Charlie diffuses the situation, telling Grandpa Joe that the Gobstopper is a great present and that the trip to the factory was enough. Placated, Wonka ushers Grandpa Joe into his office to negotiate legal paperwork and warns Charlie not to touch anything. Charlie breaks the rules and opens the notebook, adding his own inventions to the blank pages in the back, only to be caught by Wonka. Although he seems angry at first, Wonka finds it incredible that Charlie is
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