The initial idea behind this series took the form of questions such as “How can interactivity could be designed without using any software, optical detectors, or touch-operated apparatuses?”Interactivity is not merely an optical game, but an experience that enables visitors to grasp the relationship they have with world and objects in it through their own body. Our own distorted body image appearing on the mirrors shows us the significance of both our inner experience of perceiving the world and objects in it and also the importance of our location in space.