In this paper, a system called GENTORO that supports children's storytelling activities is proposed. By using GENTORO, children can make a robot play their story in the real world augmented with mobile projected graphical images. Preliminary user studies have been conducted in collaboration with elementary school children and university students, in order to investigate the acceptance level of GENTORO and clarify its design requirements, respectively. The development of GENTORO is in progress. The future plans of the GENTORO project are discussed. Keywords Storytelling, robot, handheld projector, children, augmented reality, embodied participation ACM Classification Keywords H5.2. Information interfaces and presentation (e.g.,