This is the prototype of an week long RFID project in my service design class at RISD.
The item being made had to be a social object in any definition. This would be a stereo like device that you place the instrument coins into/ or onto. Each coin placed on the device would add an instrument all on key and in tune with the current music. Removing the coin would remove that instrument from the music.
This would be used in a party situation where guests would be given a coin that they could place. The guests then have the power over the music, be it good or bad, but encourages socializing over the choices made.