  In this paper we present an integrated robotic system capable of
participating in and performing a wide range of educational and entertainment
tasks, in collaboration with one or more children. The system, called ChildBot,
features multimodal perception modules and multiple robotic agents that monitor
the interaction environment, and can robustly coordinate complex Child-Robot
Interaction use-cases. In order to validate the effectiveness of the system and
its integrated modules, we have conducted multiple experiments with a total of
52 children. Our results show improved perception capabilities in comparison to
our earlier works that ChildBot was based on. In addition, we have conducted a
preliminary user experience study, employing some educational/entertainment
tasks, that yields encouraging results regarding the technical validity of our
system and initial insights on the user experience with it.
