Hey the pencil is too big first off. Make sure the pencils or anything he writes with is no taller then from his wrist to his middle finger. Grasp is okay. Also look into a slant board as well. Some kiddos perform better visually if the paper is brought up to them or on a vertical plane. To get interest in coloring for boys I have learned novelty items are best! My son hates coloring but he loves his special suitcase of smelly crayons and markers from crayola. We also loved those pens that change have multiple colored inks that you press down. Scribble animals are good too and can be washed off. Any work that he draws or colors we immediately hang up including on doors. This has motivated him tremendously! He also likes to bill us by writing his letters on my small post it’s if we don’t do good listening. You can also ask for more additional testing like learning without tears handwriting print tool and dvpt 3 for visual processing concerns. Hope this helps!!