Walt Disney World in Lake Buena Vista, Florida, is launching the largest expansion in its history. New attractions that will be added in the next 12 months include "Buzz Lightyear's Space Ranger Spin," an interactive film ride; "The Many Adventures of Winnie the Pooh," a ride for youngsters which will replace "Mr. Toad's Wild Ride;" and a return of "The Main Street Electrical Parade," featuring floats of Dumbo, Peter Pan, Alice in Wonderland, and other animated characters.