Klopf and Kurz designed a publicly accessible square for the Mittertreffling primary school, with the title Moon Square. The artists made five circular depressions (each measuring five meters in diameter) and covered the entire area with rubber granulate. The hollows in the ground serve to create a new spatial situation which can be used for playing as well as for outdoor teaching.

(Moon Square, 2001 / Completed 2003; Rubber granulate, 29 x 15 m; Mittertreffling primary school; architecture: Josef Dürrhammer, Anton Heckmann / Linz)