Free Lead Sheet – This Old Man Free Sheet Music for This Old Man. Children's number song in 7 different keys!. Enjoy! This Old Man - D Major (Popular Key)(pdf) This Old Man - A Major (pdf) This Old Man - Bb Major (pdf) This Old Man - C Major (pdf) This Old Man - Eb Major (pdf) This Old Man - F Major (pdf) This Old Man - G Major (pdf) Other Resources More Lead Sheets Michael Kravchuk