On behalf of Unicef, our friends from the theatre collective "Bluespots Productions", together with two other partners in three cities in Germany, tried to awaken childhood memories by intervening simultaneously in public space. Because they had the idea to build a ball pool for adults, but on the one hand a comparatively small budget and on the other hand the challenge that everything has to be set up and dismantled overnight, they asked endboss for help. In order to solve the problem, we thought of a spectacularly simple architecture and implemented it together with Bluespots Productions on site: Two tilted hexagons form a diagonally stiffened shell for the ball pool by means of roof battens. The construction is easy to assemble and dismantle and suitable for reuse.