In previous years I always tried to compose a tune for the RCX to play when the robot completed a mission or something of the like. I was surfing the internet today and came across a really interesting site (although it is also an indicator of how much time can be wasted on useless things).
http://www.ceeo.tufts.edu/robolabatc...ongs/songs.htm
Basically, it's music written in Robolab 2.54. There is a whole list of songs, from the Jingle Bells to the Can-Can. Enjoy.