One of the most interesting pieces of interactive art in Chicago, the Crown Fountain at first mystifies, then embraces, and then (if you don't mind getting a little wet) immerses the viewer in art. Two 50-foot towers flank an ever-so-slightly sunken plaza. From the tower pour a continuous shower of water that fills the plaza to a depth of one-eighth of an inch -- enough to be fun, but not enough to ruin your clothes should you choose to walk through it, which is encouraged. The water pours down the towers glass block exterior in a cascade on three sides. The fourth side features banks of red, green, and blue LEDs that when viewed from a respectable distance give the illusion of projected video. During daylight hours, the faces of one-thousand Chicagoans are displayed on the towers one at a time. Each persists for 13 minutes, and during the final minute, their lips purse and a spout of water shoots from their mouths. A cascade of water falls over the faces, and a new one is revealed. These people were selected and filmed by students from the Art Institute of Chicago. They were not told they would be part of a fountain. Instead, they were instructed to act as if they were blowing a kiss. Whatever works. At night, the water does not shoot out of the mouths, and the image is not of Chicagoans, but of pastoral waterfalls and streams while the towers other surfaces glow in changing colors.