Romper Room was a long-running children's television series that ran in the United States from 1953 to 1994 as well as internationally at various times in Canada, the United Kingdom, New Zealand, Australia, Japan and Finland. The program targeted preschoolers, children five years of age or younger.
Romper Room was a rare case of a series being franchised and syndicated, so local affiliates—Los Angeles and New York were prime examples—could produce their own versions of the show instead of airing the national telecast. For some time local shows all over the world used the same script but with local children. Kids would be on waiting lists for years (sometimes before birth) to be on the show. It was called "an actual kindergarten". Originally filmed in Baltimore, Romper Room eventually moved its broadcast facilities to Chicago, then moved back to Baltimore in 1981.
Each program would open with a greeting from the hostess and the Pledge of Allegiance (unless the episode was not broadcast in America). Then the hostess and her group of children would embark on 30 or 60 minutes of games, exercises, songs and moral lessons, which were regularly accompanied by background music. The hostess (or sometimes the children in cadence) would always ask "Mr. Music, please." to prompt the background music into playing. The young cast was rotated every two months and ranged from four to five years old. (from Wikepedia)