Remember the film BIG with Tom Hanks? There's a piece of music I just can't put my finger on it, I think it's when he plays it on the big floor piano. I know he plays chopsticks but what is the tune he plays before that?
I play the piano in a pub and someone asked me this the other day. I don't know if it has a name but it' s usually one of the first things that children manage to pick out on a piano. Chord progression for example is C -> A minor -> F -> G. It's used as the basis for the old Max Bygrave's song "Fings Aint Wot They Used to Be". Hope this helps!
If you know how to play it you could try searching for it at http://sd.znet.com/~iwamura/page2.html.
It has a keyboard that you can play the tune on which it then searches for. If you do find out, please put it up here, it's been driving me up the wall for years!