This project aims to build a child android “Affetto”, which has a child-like body in size, shape, softness, and expressiveness. Realizing several structures and functions for humanlike impression or behaviors in a small body is technically challenging because synergistic hardware integration based on effective and efficient space utilization is necessary. In parallel with hardware design, we are trying to establish methods to utilize the robot as a child developmental simulator for cognitive developmental robotics and as a stimulus presenting device for psychological experiments of interpersonal cognition. More details are introduced in Assist. Prof. Hisashi Ishihara’s website.