The unit would consist of a matrix of individually
magnets that when switched on would bond to iron
sealed behind the clear plastic front of the unit.
Turning on magnets in a particular pattern would cause
filings to bond to that particular matrix such that
and words could be created when the person shook the
unit. A pre-programmed sequence of activated magnet
patterns would "draw" picture in the style of sand art and
change as the story progressed. The link describes what
finished product would look like.
The person would read the page, look at the picture,
shake the unit. Motion sensors would sense the shaking,
turn all the magnets off, erasing the present picture and
activating the next matrix of magnets to create the next
Stories told in sand art have an interesting style to them.
would be a cross between an etch a sketch and a Kindle
since stories would be downloaded into the unit.
You could even have animation to some degree.
I think it would also be possible to have the front screen
be touch sensitive such that you could draw in your own
stories and art, and unlike the Etch-a-Sketch, you could
save it to recall and view later.