6. Have a garage sale
Just about every family with kids has collected a bunch of stuff they don’t use anymore. Get rid of it by hosting a garage sale, and let the kids in on the action.
Have them prepare by sorting their belongings into “keep” and “sell” piles. Then, help them set reasonable prices and come up with a way to keep track of who sells what. They get to keep the money from what they sell, and you get a clean house.