The instrument that was the most fun for me to learn to play was a harmonica. My brother and I had only one between us and we both learned to play sitting after supper in our big kitchen with the door closed between us and the living room where the rest of the family were. (I have no idea what the family thought about our musical ability- I don't remember anyone ever commenting on it.)

As the fire in the woodstove died and the kitchen cooled my brother sat on the open oven door and I sat on a chair facing him. One of us would play a tune, the other would squeal, Oh yes! Let me try it too! and we would hand it over, back and forth, back and forth, until Mom would come in and tell us it was bedtime.

It was great fun, and we did the same thing with the 'Tonette', a plastic recorder type of thing. Too bad we never had more than one instrument.

Come to think of it, we learned guitar the same way about 10 years later. He learned chords first, I learned to pick first.