OK. A cube with six sides in self righting. So is a four sided dice. What exactly defines top and bottom in my situation versus theirs? And what value does self righting posses in sand or on a rough surface? If anything a turtle is more of a true Gömböc than this is. Turtles and tortoises have true tops and bottoms and are the only use cases for a Gömböc that I was able to find.