I wish I could remember the source of this earworm. I vaguely recall, during the late '70s or early '80s, a TV contest in which a cartoon character, a puppet, or some adult performer asked kids to mail in their name, address, phone number, and possibly the answer to a trivia question for a chance at winning a prize. What stuck with me was this performer or character singing, "Just write this down on an index card and send it off to me!" I'm not sure why those instructions were sung, but I've been trying to remember the origin of that lyric for decades.
Who sang that line? What was the trivia question, if there was one? Was this a national or local contest? I might never remember.
