Retractible Cord Or RubberBand Battery

A simple pull string mechanism powered via rubber band. The spool posts are a bit long so someone could put a gear on it and use this to power a clockwork contraption or pull string toy. (If you don't need the extra lenth just clip them to size) Or you could use it as a retractable key leash {or lighter leash combined with my bic lighter holster)

Also makes a great powered wheel. Just omit the string and wedge the rubber band between the two shells after pulling it through the center spool