An extension project for the kindergarten in Ichihara, Chiba. It is aimed to be a community center not only for children but also for their families and graduates. We provided huge air volume to enables children to run around in the building by ready-made tent warehouse, which reminds of the existed warehouse stood in the same site. The tent warehouse also covers the freely folded wooden walls that forms place-like thing. We also tried to stimulate children's imagination by leaving the things like front side and backside of the walls, and even the confliction of the brace structure.