Visitors to this major retrospective were be able to handle replicas of his Passstücke (Adaptives) – papier-mâché pieces made to be picked up and moved. They were a turning point in the relationship between art and its audience. He also created playful sculptures incorporating objects from everyday life such as a hat, a broom, or even a whisky bottle. In his final years he produced large, brightly coloured and absurd sculptures both for galleries and public spaces.