Scatter rubber ducks around your bathtub, of course. Look for framed printed of rubber ducks, or have your own made from inexpensive prints. You can paint ducks on the tiles of your bathroom if you have the talent. Shop the big department stores (or Overstock.com) for rubber duck shower curtains, shower curtain hooks, toothbrush holders, and more. Don't forget the floor. Try a light blue rug to represent the water if you are all "ducked out".