Laundry Basket in Closet. No need for hampers and can take it straight to the laundry. what a great kids closet! Do 3 baskets, white, colors and darks. Also get different color baskets so kids can sort.
the boys' room: Super Cheap Small Closet Makeover. Anchor an IKEA Expedit Shelf into the wall. Use wood dowls (anchored into the wall and then screwed into the Expedit) for the new clothes rods. Two levels of clothes rods adds more space for clothes.