2. Great Moments with Mr. Lincoln (1964)

One of Walt's ideas to expand on Disneyland was to extension of Main Street into Liberty Street with a tribute to the presidents, but the technology of the day wouldn't allow him to create the show he wanted. Eventually the idea was scaled down to a single president that Walt particularly admired: Abraham Lincoln. The Great Moments with Mr. Lincoln show, which opened alongside several other Disney-produced attractions at the 1964 World's Fair in New York, featured an alarmingly lifelike animatronic version of Lincoln — the first "human" audio-animatronic — whose face was sculpted based on an actual life mask of Lincoln. The animatronic stood and read a speech which was compiled from a number of different sources.

The show was a hit at the fair and opened at Disneyland in 1965. Since then, the animatronics technology has been updated and the speech Lincoln gives has been modified several times, but the core of the attraction remains the same. Instead of Mr. Lincoln, Walt Disney World took Walt's original idea and has a Liberty Square area with a full Hall of Presidents, featuring all American presidents, prominently featured.

1. Carousel of Progress (1964)

Built for the General Electric pavilion at the 1964 World's Fair, Carousel of Progress was a show that presented the advance of technology — with GE's contributions heavily represented — as shown by the lives of an average family with scenes that take place in different eras of the 20th century. The show is presented entirely by audio-animatronics and the theater rotates (thus carousel) to move from scene to scene. This was reportedly a favorite of Walt's, and he'd certainly be pleased that it's not only still running, but it's the longest-running stage show, with the most performances, in the history of American theater.  

Though the show changed very little when it moved to Disneyland in 1967, it received some notable changes when it moved to Florida in 1975— at the request of sponsor GE, which felt they weren't getting the most of their advertising dollar with the long-running show which primarily played to a California audience who had seen it before. The new version featured a modified theater, a new theme song, and a new cast of voice actors, though the premise remained mostly the same. Throughout the years, the show has also seen several updates to bring the technology in the show's final scene up to modern standards — most recently in 2011, when a bulky CRT television was replaced by a more modern flat-screen display.