So I'm not sure if this is the right place - and its a crazy question - but I am trying to get something to spin and/or flip when I put it in a beaker of water, just by its own weight and gravity. I have tried a maple seed shape, propeller shapes, simple curls, sprials, Rocchetti pasta shapes, but they all dont spin or flip fast enough. Does anyone out here know what the ideal shape would be? I know that the density will be an issue relative to the mass? But aside from that I need to know were to start , before trying to dial in the variables. Any ideas? By the way, a propeller type shape worked well but only with 4 blades and above. I have not been able to get anything to flip end over end yet. Any ideas? It has to be quite small , like say the size of a penny or a dime. -Cheers.