Learning German Songs

I'm trying to remember the name of this song I used to sing in 7th grade German (as a second language) class. I don't know if it's even out there anymore because if I remember correctly it was on a cassette tape. Anyways the lyrics were something like this:
Sag mir, sag mir, sag mir doch
wie alt, wie alt, wie alt bist du
eins, zwei etc