Workshop: a) Heart valve of the construction site that allows a (safe) repetition of the same gesture. Spatial organization based on a precise sequence of rationalized movements: receive, classify, align, cut, assemble. Place where raw materials are transformed into finished modules, where every tool has a dedicated space. b) Fixed period of time in which to work on a common cause, share knowledge and materials. Often led by someone who knows a bit more than others, but not necessarily. A light introduction to a subject area with educational aspects free of the strict regularities of school.