#square_block__cube  a block in the (approximate) shape of a cube
  supertype:  block  a solid piece of something (usually having flat rectangular sides); "the pyramids were built with large stone blocks"
  subtype:  dice__die  small cubes with 1 to 6 spots on the faces; used to generate random numbers
     subtype:  five-spot  a playing card or a domino or a die whose upward face shows five pips
     subtype:  four-spot  a playing card or domino or die whose upward face shows four pips
     subtype:  six-spot__sixspot  a playing card or domino or die whose upward face shows six pips
  subtype:  ice_cube__icecube  a small cube of artificial ice; used for cooling drinks

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