Boma does have kid friendly food. I remember macaroni and cheese and chicken fingers. I know there were other things for kids but I can't remember what else.
A big plus on the kid's buffet at Boma is spaghetti. It's the only buffet where I have seen this. Even my girls get tired of the fries and chicken fingers that show up everywhere. They also have PBJ sandwhiches and other popular kid food.
When we were there the chicken fingers had bones in them, a big turnoff to my son. I had never before been somewhere where chicken fingers/tenders had bones. I don't know if this was typical there or an unusual occurrenece, but be prepared.