This project was conceived around a major priority: to intervene on an unbuildable listed agricultural site. It was determined by two issues : its function as a sheltered space for children, and its domination on the ground. Like a tree house, built for the duration of a summer, this kit object cannot be integrated into normality. The occupants are aware of the space and its dangers and, although the shelter is integrated into the site, it is still not anchored there. Hence the idea of having it rest against a permanent structure, a rainwater tank, meeting the requirements, legal and hygienic, of the site and being convertible should the occasion arise into a paddling pool. A twofold space, My first house is both an introverted refuge providing shelter from the world and its aggression and an observatory allowing for contemplation of the scenery spread out below.