The original idea was to make it round, like Jansson always made it in her illustrations for the Moomin stories, but since it was going to be displayed in a corner at the Bratislava biennale of illustrations in 1979, they decided to make it square instead.
Den ursprungliga idén var att göra det runt, som Jansson alltid framställde det i sina Mumin-illustrationer, men eftersom det skulle ställas i ett hörn vid Bratislavas illustrationsbiennal 1979 byggdes det kantigt.