Although there is no way that BBD shoved this kid very hard or he would have been flung to the ground in a heartbeat, this should be a no brainer. It was obvious that BBD didn't really see him, and was just doing a "swim move" past the person there, so tell the kid your sorry and be done with it. This is a child for goodness sake. We've got two grownups acting like children in BBD if he refuses to, and the dad for making a big deal about it. People learn this from kindergarten. If you hurt or bump into someone you say you are sorry. Be done with it! Show some class.