So this is how quick Karsten picks up tunes by ear and plays them on the piano. I have not taught him this song. He was playing around on the piano this afternoon and picked it out all by ear. And pretty quick too! I'd say within a matter of 10 minutes he had this song down. You can tell he makes a few mistakes, but if he practiced it another 10, he'd probably have it perfect! Enjoy Grandpa! We'll get him to play us some more as time goes by!