A binder cover I did for my 10 year old featuring things he likes; guitars, skulls, spiders. Easy enough to do, just buy one of the binders that has a clear sleeve on the cover and drop in. Done in ballpoint pen.
so cool! your son is going to be the coolest kid in...um 5th grade? i really like big thick black line mixed in with smaller lines, so this really appeals to me. my mother used to leave me notes to read when i was kid she had to leave really early and then i'd get that nifty little note, she drew all over them and wrote beautifully. i don't have kids, but i can kind of imagine how good it would feel to make something for them that they really liked.