In order to include the ruby slippers as part of this film, Disney had to pay royalties to MGM, the studio which had produced Il mago di Oz (1939). The ruby slippers did not appear in L. Frank Baum's original novel "The Wonderful Wizard of Oz"; they were invented for the 1939 film to better take advantage of the newly developed Technicolor process. Interestingly enough, in "The Wonderful Wizard of Oz," Dorothy wore a pair of magical silver shoes which were lost when she used them to return to Kansas. In the subsequent novel "Ozma of Oz," one of the books on which this film is based, Dorothy and her friends meet the Nome King who possesses a magical belt with properties similar to those of the silver shoes. Early drafts of the script for Return to Oz reflect this, with the Nome King cutting up the ruby slippers to make his magical ruby belt.

Film

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