Okay so, as I understand it, sburb exists to help a universe "reproduce" in a sense, and the players of the game get to rule over their newly created universe. If so, where are the players of the session that created the kid's session? Tell me if I've just completely corkscrewed the entire idea but I never see any godlike people ruling over the kids' universe.

Karkat and his team where the ones who created the kids’ universe, they just never entered it.