I worked with a magician a while ago. He would ask the audience members for a "person" an "activity" & a "product or thing" & then make up a simple song from it. (A bit like Improv comedy/Theatre sports).He always used the same tune, but I can't remember which it was. Obviously there are any number of trad. tunes which would work. Anybody have any ideas, I'd like to try it in our show.