A boy placing the bells in the right order. Postcard published by the DMG (German Montessori Society), around 1927 - T. Müller, R. Schneider, Lehrmaterialien 1913-1935. Möbel und Architektur. Techning Meterials 1913-1935. Furniture and Architecture, München, Prestel Verlag, 2002, p.95

Category: Montessori schools