This paper presents an educational distributed virtual reality-based environment for children called EVE - Environnement Virtuel pour Enfants. EVE is used in elementary schools from different countries as a supplementary tool in teaching children to read. This virtual environment supports cooperation among members of a dispersed team engaged in a shared context. By the mean of their avatars, special cases of agents, children are allowed to interact and to give decisions using cooperative mechanisms. The virtual environment architecture is reactive agents based. The FCMlike dynamic action planning mechanism assures agent's adaptability to its environment changes. It also permits to the pedagogical agent to adapt its behaviour to the child actions. The implementation is based on a client-server architecture, VRML and C++ as languages and AR