Agree with Yanko. This is a splendid candid, just the way the boy is looking at the camera. Only nitpick is the focus seems a tad off, portions of the body seem sharper than the face. In any case, this deserves a page of its own in the family album.
I can't believe nobody has commented on this yet. I like this but I can't really pinpoint as to why. I guess it's just that the moment you captured feels authentic. With so much focus on setup shots and trick photography at DPC you don't see many good candids like this one.