dug out the little alarm clock i bought in kyoto, which is radio controlled to apparently usually show the wrong time. one of its other nice features is showing the kanji for the day of the week, and i'm imagining a cute and mostly pointless device that *only* shows today's kanji on an LCD screen. i think it would be a little plastic square thing powered by AAA batteries and the full screen is taken up by the day's kanji (i.e. today, tuesday would be 火 )