Product: Clock: Display: Light
Sundial hat   (+8)  [vote for, against]

The hat has a scanning laser in the brim. Orienting itself with an inbuilt compass, it displays the markings of a sundial on the ground around you, so that the shadow of your head indicates the time.
-- ldischler, May 28 2006

does it come with a manual?
-- po, May 28 2006

Head inclination angle would need to be monitored with respect to latitude and longitude, in addition to the compass function you speak of. All in all, a gloriously complicated and vastly less practical wrist watch alternative. Projected bun.
-- Texticle, May 29 2006

random, halfbakery