I completely forgot to post this last week, but when we visited Arizona, we stopped by the Musical Instrument Museum. From Alexander's point of view the best part was the area where you could get hands-on with some of the instruments. Here he shows true aptitude for the xylophone-style of instrument.
The photo I wish I had was the image of him playing the theramin. I think he may have broken new ground in usability as he exhibited a new technique using his feet. With some practice I'm sure he could really change the face of theramin playing.