a show called "Harnessing the Lighting". Hosted by an "electro-mechanical" man named Wilbur K. Watt, it would chronicle the evolution of electricity in the home from the late 19th century to the present and beyond, and show how much electrical appliances—specifically, GE appliances—had benefited American life. After each time period, or "act", was over, the audience would get up and walk to the next one. The idea was eventually scrapped. The Main Street expansion idea fell by the wayside. One reason was that technology wasn't yet available to achieve what Disney wanted. However, the idea stayed in Disney's mind for the next few years. GE still wanted to work with Disney, but a better outlet was needed. 1964 New York World's Fair General Electric approached Walt Disney to develop a show for the company's pavilion at the 1964–1965 New York World's Fair. Disney leapt at the chance to rekindle his relationship with GE, who would fund the project and the new technology necessary to bring it to life. Reaching back to the Edison Square concept, he again pitched the idea of an electrical progress show to GE executives, who loved it. During the planning phase, Disney's Imagineers perfected the Audio-Animatronics (AA) technology necessary to operate the "performers" in the show, using technologies similar to those in Walt Disney's Enchanted Tiki Room and Great Moments with Mr. Lincoln, another attraction designed by Disney for the 1964–1965 New York World's Fair. The Imagineers, led by Disney engineers Roger E. Broggie and Bob Gurr, also devised a "carousel theater", so that the audience could stay seated and ride around a stationary set of stages, instead of getting up and walking from stage to stage. This allowed the audience to remain comfortably in place during scene changes, avoiding time-consuming disruptions between acts. Singing cowboy Rex Allen was tapped to voice Father, the host and narrator that replaced the original "Wilbur K. Watt" character. Allen later commented that he did not know exactly what he was getting into. Walt Disney asked songwriters Richard M. Sherman and Robert B. Sherman to create a song to bridge the "acts" in the show. When he explained what the show was about, they decided to write a song based on Disney's enthusiasm, titled "There's a Great Big Beautiful Tomorrow". The brothers later said that they considered it Walt's "theme song," because he was so optimistic and excited about the