Peter Keler's cradle design dates back to the Bauhaus's inception in 1922. It consists of a blue circle, a yellow triangle, and a red square, and it demonstrates the impact of Wassily Kandinsky's synaesthetic color theory on Peter Keler. At the same time, it incorporated the initial notion of a floating, rocking, and rolling item, which became a Bauhaus emblem. It was initially planned for a Walter Gropius furniture competition to create beds for a man, woman, and toddler.