Two groups. One decides on a famous quotation or book or song or play or movie title, like “All’s Well that Ends Well.” (OK, I admit this is advanced. It could also be “My Bonnie Lies Over the Ocean.”). They break the quote up into syllables, and assign each player a syllable.
Then, they sing a song, all singing their syllables at the same time, while the other group tries to guess the quote.