Knock Knock (Who's there?)
We've played a million silly games from bingo to gin rummy.
But, if you're good at puns on names, you'll find that this one's funny.
So, when you next have company,
Or folks start dropping in for tea,
Lyrics taken from http://www.lyricsmode.com/lyrics/s/spike_jones/knock_knock_whos_there.html