This is the prototype of e-Bowl.
It was originally designed to promote a tactile, three-dimensional awareness
of data in the palm of the hand by linking the display of data with
vibrations.
This interface design can be applied to such devices as PDA books
to offer a reading experience close to reading an actual book.
For example, a reader can tilt the device to turn the page of a book,
or feel how much progress has been made in reading by sensing its weight.
