 Thirty of the preserved puppets are stored at the Zentrum Paul Klee, Bern.Some of Klee's early preserved children's drawings, which his grandmother encouraged, were listed on his catalogue raisonné.A total of 19 etchings were produced during the Bern years; ten of these were made between 1903 and 1905 in the cycle "Inventionen" (Inventions), which were presented in June 1906 at the "Internationale Kunstausstellung des Vereins bildender Künstler Münchens 'Secession'" (International Art Exhibition of the Association for Graphic Arts, Munich, Secession), his first appearance as a painter in the public.