An old spruce had to be cut down, while a stump of about two-meters high has been preserved. The task was to build a simple, small house on this stump. It should serve a few children as a playing house. The construction is very simple: Twelve wooden triangles are screwed around the old tree stump. This circle of triangles prepares the field for the other construction-parts of the small house – the wooden columns and the roof beams. All of them refer to the grid of the triangles and form the visible framework. Because of the position of the old stump, which stands only half a meter away from the boundary, the construction doesn‘t follow its ideal character as a symmetric one. So the midpoint of the construction is not in the position of the stump. The house gets a certain orientation and uses this shift for its somehow peculiar character. The force path of the construction is at the end nearly congruent with its architectural image. The parapet is in this frame fastened from behind and makes the tectonics of the house visible – like the seam of a wrong dressed sweater. The cladding of the parapet with the bark of the old tree creates the impression of a tree on the stump and combines in this way the house with the stump. The installation and workmanship of the tree house is as easy as sloppily – namely self-built and a result of a funny bricolage. Nearly as in Jean Prouvé‘s assembly scenario with his two „screwdrivers“ only a cordless drill (and a fox tail-saw) are necessary to assemble the house.