One things I'm always keen to explore is the use of MINDSTORMS in ways that are not immediately obvious. I was lucky enough to have the chance to play with the new colour sensor that will ship with the 2.0 kit and came up with this little music sequencer.
Each coloured ball represents a different note. As the colour sensor passes over the top, the note assigned is played. Different rhythms are possible by placing the zamor spheres in different places on the holder.
Inspiration for this came from the BeatBearing project. http://www.beatbearing.co.uk/