The design of the OZ head in WICKED was influenced by various elements except the Oscar puppet from Sesame Street.
The Wizard of Oz was influenced by various elements, but the Oscar puppet from Sesame Street was NOT an influence for the design of the OZ head in the musical WICKED. The Scarecrow representing farmers, the Tin Man representing industrial workers, and the Cowardly Lion symbolizing political leaders were key characters in the original novel, while the wicked witch represented money interests from the East.