When it is associated with a pedagogical approach centered on human realities, clay offers all the qualities needed in order to awaken and develop a person's creative potential. Creativity, the capacity by which form is bestowed on what was not there before, is something inherent in every person, there from the start, an 'appetite' present in everyone. Creativity is not something transmitted, it simply 'is', it can be awakened and nourished. A working group meeting around brother Daniel de Montmollin, at the end of three years of shared reflection, has succeeded in defining a set of key-words, arranged in the form of a glossary, indicating the notions basic for any who are engaged in the task of accompanying others.