Bleach doesn't clean shit, it only sanitizes. If you're going to clean up after his shits, just use like... Lysol Bowl Cleaner or something. You don't want to bleach your toilet too much, especially if you're on a septic tank.
Granted, if you bleach and then brush, sure it'll clean it but I mean... You're just making it harder on yourself. Toilet bowl cleaners were invented for a reason.