I am sure that the "bigger rib bone" that you are feeling has nothing to do with the pain in the abdomen that he is having. Such pains can occur due to hunger, muscle stress due to excessive running, constipation
, loose motions, external blunt injury
(against furniture or while playing cricket or football), indigestion
(e.g. overeating) or even psychological reasons (school avoidance, for example). If you are still concerned, you should see a doctor and get his rib cage
X-rayed to make sure there is no problem that is being missed.
= Dr. Taher