The aim of this communication is to present our approach to design a tangible and augmented environment for learning. In addition to the well-known user centered methods for designing interactive systems, our approach integrates disciplines such as HCI, Ergonomics, Instructional design, and Pedagogy. Our work will be illustrated with the presentation of a project founded by the French Government. This project aims at enabling children and teens to conceptualize by themselves. Its main goal is to enhance children and teenagers disciplinary and collaborative learning at school by promoting social relationship, knowledge sharing and the construction of concepts to learn through various levels of physicalizations.