Family A awards/deducts points for each childs activities,homework, chores.... If a child leaves an item out without putting it away their item is auction off at the end of the week(5 kids). If they have points left they can bid for extra quality time with Mom/Dad.
Of course the other family is just the opposite.
I just wish I had thought of this when my kids were growing up, I would have reserved the right to bid and I'd have some really nice stuff!