I dunno about the opening line... Maybe something describing both of the kids whereabouts, and slowly describing as they meet together.
The detailed scenery for the rich kid is obviously going to be something royal, showing that he's very blessed for the life he has, but maybe he takes it all for granted.
The detailed scenery for the orphan could be that he lives in a sad, pitiful home and he wishes that he could live in a better home, or just have a different life. He's grateful for the smallest of things.
