Somewhere between a concept design and practical proposal sits this stool, perched perpetually (yet variably) on just three of five possible points of contact.

It is in some sense a play on the principle that a three-legged stool is balanced by default, but it has pragmatic potential as well. With an actual seat on top, you could, for instance, rock it around and lean in different directions as desired.

And yet, while potentially always more stable than a four-legged chair, there is a visual imbalance that keeps the user on edge, because some portion of the piece is always off the ground, appearing precarious.

Martin Vallin is a Danish furniture and architectural designer who enjoys these kinds of experiments and often hides complex ideas in simple wood forms. He has exhibited this and other pieces in Stockholm and Milan.