Blimey! I think my musical ability at that age didn't stretch further than London's Burning on the recorder & The Camptown Races on the guitar
The second piece is also played by seasoned musicians...I think that makes a little difference to the first piece
Mozart wrote his first symphony at the age of 8
I've mentioned Alma Deutscher before who was a British child prodigy who started playing the piano when 2, the violin at 3, started composing at the age of 5. That's why some thought of her as a possible Mozart. She's now 19 and has moved to Austria.