Over the years we've been to school concerts with our children. Our son seems to be able to play the keyboard by ear just by listening to the music he figures out what keys to play. The only problem with this is he can't open a music book and read the notes to play a song. So the simplest way for him to learn this is on his xylophone. The xylophone with the key letters written on it versus looking at a book and putting two and two together are working out fine not to mention the beautiful tones of the xylophone. Our school seems to contain a few rock prodigy in the making. I hope our son continues on that path.