The guy whose enthusiastic interpretation of the last movement of Beethoven 5 became a viral video? I remember thinking, wow, if this guy keeps going, someday, after many years of work, he could be standing in front of a real symphony orchestra. And it's all turned out to be true, except the "many years" part. Here he is at age four. His stickwork has become a little more conventional, but the same joy is still there.
The original video: