In 1922, the Bauhaus apprentice Peter Keler, who was just 20 years old at the time, was inspired by his teacher Wassily Kandinsky to design the so-called Bauhaus cradle. This utilises the primary colours of yellow, red and blue and the triangle, square and circle forms that Kandinsky assigned to each of these respectively. The cradle was presented at the 1923 exhibition at the Haus am Horn.
Schulz, Bernhard (2009): Das wunderbare Möbel. Peter Kelers Kinderwiege, in: Modell Bauhaus, ed. by Bauhaus-Archiv / Museum für Gestaltung, Stiftung Bauhaus Dessau und Klassik Stiftung Weimar, Ostfildern, pp. 119.
Siebenbrodt, Michael (2000): Bauhaus Weimar. Entwürfe für die Zukunft, Ostfildern-Ruit.