At that level i was in class 2 or 3 primo. It has taken him long to discover his talent. Its never too late though. Artistic talent is just like a mine deposit, it will always be there. Encourage him to produce more work constantly
Hehehe...someone once told me I couldn't draw when I was in class 5. They even laughed at my attempts at the time. When I went home for the holidays, I asked my parents to get me a drawing book (the plain paper type) and colouring pencils. Then I befriended the class artist, one Abubakar Githinji and began to copy whatever he drew. In two years time, I'd perfected it enough to be able to draw it on my own. Suffice it to say that indeed, practice makes perfect. The talent stays with me todate.