Musically inclined

When I was a child about 9 or 10 years old I received a floor organ
complete with a music book so one day I was sitting in my room
I started to read the manual for tapping the keys and chords 
then I picked a song to play the song I picked was Onward Christian 
Soldiers  and my mother came in the room and was so surprised 
that I had figured it out musically  inclined .