Gilbert wrote the words and Sullivan the music.
One of the operettas of Gilbert and Sullivan is titled "Princess Ida."
William S. Gilbert and Sir Arthur Sullivan.
The full names of the creative team responsible for the Gilbert and Sullivan operas were William Schwenk Gilbert and Arthur Seymour Sullivan. Gilbert generally signed his name as "WS Gilbert" and was know as "Schwenk" to his close relatives. Sullivan generally signed his name as "Arthur S. Sullivan" and never ussed just his three initials.
All performances of Shakespeare are using public domain materials. Film adaptations of Jane Austen novels are based on public domain materials; the film "Topsy Turvy" included many excerpts of the public domain works of Gilbert & Sullivan. The fight song of the high school on "Veronica Mars" was actually the official song of the US Army. The webcomic Wondermark is created from images scanned from 19th century books. There are hundreds if not thousands of other examples.
William Schwenk
William Schwenk
The Compleat Gilbert and Sullivan - 1984 was released on: USA: 21 March 1984
While much of Gilbert and Sullivan is suitable for children, none of their operettas were written FOR children.
The Savoy operas were the original name for the operas of Sir Arthur Sullivan and W.S. Gilbert, aka Gilbert and Sullivan.
Gilbert and Sullivan
Gilbert and Sullivan.