a magnificent little (literally) piece by nendo.
image source: core77
"A stool grows a backrest, and becomes a chair. When an armrest sprouts from it, it is an armchair. The stool grows sideways, and becomes a bench, or lengthwise and becomes a lounge chair, or even a bed. If we can see a piece of furniture's function changes as it grows and matures over time, we may find new clues, even a way to design form naturally. This installation explores ways of determining form based not on function or a modular system derived from the proportions of the human body, but on 'furniture that grows'." - nendo