I'm 13, and play piano, and I don't find this impressive at all. I don't know how you call this a prodigy. Fantasie-Impromptu is one of those pieces that seem very fancy and cool, but in reality is very easy to play, and you just play it to wow people. A piece that is actually difficult that he should try, and I'd consider him a prodigy then, would be la Campanella.