Head architect Walter Moser, had no idea what to do with the schoolyard, so he asked Ralph Bänziger, a junior architect on the team, to give the school kids something to play with. Bänziger came up with three concrete loops that could be entered and walked around. Varying in colour from ‘brut’ to washed-out terracotta, the playsculpture blends elegantly into the schoolyard and the wall separating the school from the residential area. The original also included a shallow water basin, but this soon proved too expensive to maintain. Bänziger’s congenial loops were an instant hit. Although not quite in the way he had intended.