She got the eyes from a special effects supplier in Los Angeles. He told her to make them big and blue, like the Gerber baby, if she wanted people to treat her robot like an infant. He also helped her embed a color CCD camera into the pupil of each eye. A network of three integrated circuits control perception and attention. Three more drive the facial motors, the motivational system, and eye and neck motion.
Drives are similar to needs, and there are three in Kismet.
The social drive becomes a need for people, the stimulation drive seeks toys and other objects, and the fatigue drive creates a need for sleep. When unattended, the drives move into an understimulated regime, so needs grow for social interaction and stimulation. Too much activity and the drives drift into the overstimulated regime, and a need grows for a break from the action. Kismet's emotions are not linear. The emotions break down into high and low values, positive and negative states, open or closed positions, each conforming to research on actual human emotions.