This thesis redefines craft as a social action anchored in play that intervenes in existing material and immaterial flows. A circular and sustainable architecture follows naturally from this definition. The architectural project operationalizes this new definition to rewild the old industrial site of the Lea Bridge Waterworks in London. The project is a glass blowing workshop, greenhouses, and rewilding research facilities which act as a catalyst to transform the site to connect with a larger green structure, as well as support other craft activities in the valley.