Hello! My son, Dylan, has been drawing for quite some time and is doing well. He's trying to learn more and more and we're thinking about getting him in to art classes this summer while he's out of school (He's 10). We will post some of his work later. Anyway, our question is this: he uses graphite pencils - Daler Rowney - and we are needing a suggestion of a really good sharpener. The cheap ones just make his pencils break and he gets so frustrated. Any feedback and tips or suggestions for him as he's entering the world of sketching (and art in general) would be great!! Thanks so much!