6,500,004,385,632 teaspoons of dirt is about 70,633,165,968 pounds or 32,038,665 tons.
Sing Song Prison was a play on the state correctional prison at Ossining, New York, known as Sing Sing.
The cartoon is a send up of the newly emerging home television industry, in that all programs appeared to be the same, or so critics claimed.
Early model cabinet TV sets had knobs to change channels and adjust the volume. There were no remotes, and only the three major networks were broadcasting, apart from some local channels in larger cities. The picture tube was small, as shown here, but the cabinet itself was sturdily made. Vintage era sets are now sought after collector's items.
Tex Avery and Michael Lah co-directed two cartoons after Avery decided to leave Metro-Goldwyn-Mayer animation studio and return to Walter Lantz's studio, where his animation career began: this one and El Alguacil Droopy (1955). This was Avery's last short at MGM animation studios; Lah went on to direct more "Droopy" cartoons, but they were not as popular.