Via mommysavers.com, I found this cute craft idea that looks like it would really take a nice long time to do and get those creative juices flowing:

Using an old catalog or magazine, cut out pictures of chairs, tables, curtains, bathroom fixtures and other furnishings. Spread out a newspaper or large sheet of drawing paper. Sketch an “open sided” house. Have children place the pictures of the furnishings in the rooms of their choice. They can cut out more pictures to redecorate their house, cut out pictures of people, toys, pets, anything they like!