Limpet Pushbuttons (2009)
These Limpet Pushbuttons combine seashells and electronics, by dissecting existing electronic gadgets, extracting their functionality and squeezing it into a seashell.
Instructable >> http://www.instructables.com/id/Barnicle-Button/
The Limpet Pushbuttons trigger a variety of events, some simply turn on an LED light or vibrate a motor, others play the sound extracted from a toy or greeting card.