One thing that works well is to place a shelf along all of the walls about 12 inches down (high enough so that you cannot hit your head). Take these shelves and decorate them to match the color scheme of the room. Wallpaper or a nice fabric bunched along the edge works well. You do not have to place only practical items on the shelves- dolls, lamps, books, etc. You need to use your imagination. It really can be made to look like it belongs in the room.