  Interaction with the physical environment and different users is essential to
foster a collaborative experience. For this, we propose an interaction based on
a central point represented by an Augmented Reality marker in which several
users can capture the attention and interact with a virtual avatar. The
interface provides different game modes, with various challenges, supporting a
collaborative mobile interaction. The system fosters various group interactions
with a virtual avatar and enables various tasks with playful and didactic
components.
