A working exploratory space is difficult to achieve by a system that must rely on computational algorithms for processing perceptual input. The KidsRoom story was forced to be primarily linear. Children must always be clear of the current task. Group activity is very different than individual activity. Sensor lag makes exploratory spaces difficult.
Children require attention-grabbing cues.
People are very sensitive to timing, which is tricky to tune well when multiple scenerios must be anticipated. Narrative segments should be short, permitting better system responsiveness. The story should not violate reasonable expectations or set up expectations the perceptual system can't meet. With multiple people in the space, determining causality is sometimes difficult. When the system does understand something about the room's environment, it should be certain to convey that to the room's participants through the story.