...you know, "feel-o-meter" for those of you who do not speak German.
Apparently, there are some creative artists in Lindau, Germany, that combined art and technology resulting in an interactive product. A monstrous-sized Smiley face is mounted on a lighthouse in the city that is constructed of fluorescent neon tubes and a bunch of steel pipe, and the thing displays a facial expression depending on the city dwellers' moods...huh?