Built in idea for the dining room door! Oh how I love built ins. Ikea Shelves Into Built-in Bookcases :: I really love this. You could turn any room into a library with this idea. And you don't need ikea for it, either.
Recorder - I had this model. Had to learn it in school. The course was called recorder karate and we got colored string tied to our recorders as belts when we played a song with less than three mistakes.