New York magazine is celebrating 40 years of Sesame Street with a pageful of fascinating factoids in its current issue. A few: The show was almost called 123 Avenue B. Designer Charles Rosen based the set "on an amalgam of streets in Harlem, the Bronx, the Upper West Side," according to the mag. The very first episode on Nov. 10, 1969, was sponsored by the letters W, S and E, and the numbers 2 and 3. And Big Bird is still played by Caroll Spinney, now 75 years old. In other Sesame news, don't miss the new show opening.