Those caracters were created for an exhibition about water purification systems. Each character symbolizes one type of pollution, and is progressively eliminated in order to obtain clean water. The target visitors are school kids age 8 - 12.
From left to right: Organico, Stengelchen & Da'Bechs, Bakteria, Kauties, Toxico, Fäkalius and Mr. Rolli
From left to right: Organico, Stengelchen & Da'Bechs, Bakteria, Kauties, Toxico, Fäkalius and Mr. Rolli