I made a skirt which demonstrates many of the components of the LilyPad Arduino ProtoSnap Development board, including the white and Tri-Color LEDs, the light sensor, buzzer and button.  It offers random twinkles of the LEDs to initiate conversation, then when the light sensor detects light at 70% of ambient it will play the Imperial March on the buzzer (because now you are on the dark side). A button on the sash will activate the vibe board, to which I added a supplemental battery for extra vibe. Finally, the battery and buzzer are sewn on with snaps so they can be removed prior to hand washing.

If I had more time I might try to represent some of the code elements in embroidery.