Our cable spool duck house (http://www.instructables.com/id/Cable-Spool-Duck-House/) was so much fun that I decided to keep going and build another "tier," which would serve as storage for duck-related items, as well as a bench where one might sit and read aloud to ducks, were one so inclined.
Step 1: Materials
Two of these half-round bench/cabinets can be made with one four-foot cable spool (if you throw in a few additional pieces of wood). Some hinges and a latch and/or handle are required if one expects the door to behave in a door-like fashion.
Galvanized wood screws holed it all together.