As far as iPhone speakers go, this one looks more like an educational toy from a museum shop than a speaker. It's got a novel twist however, if you can pardon the pun, with each fold making the volume increase/decrease.
A typical Yanko Design concept, it was designed by Chun-Chieh Yang and folds up to a small square-shaped size for easy transporting. It's certainly a refreshing look at just how we turn audio up or down - and I can imagine it'd be very popular with the children. [Yanko]