Earlier today Sam was practicing Piano--playing an Andante in G. Just as a lark I asked him to play it a third, a fifth, and a seventh lower. To my profound astonishment, he did so without a hitch. And then he played the right hand a third lower and the left hand a fifth lower.
Given that I'm only now coming to terms with all the technical terminology of music theory, I'm blown away that ten year old not only understands it, but is able to interpret and play it.
I'm also extremely gratified to hear him playing The Phantom of the Opera as a cha-cha--very latin rhythm on the left hand ostinato. Really cool. What a constant source of blessing. I'm sure glad that his mother never opted for the easy way out of things.