inventoroskar vandeventer and his love of magic cubes.en used in meditation activities for centuries, and arranging them in gardens or piling them up on top of each other can have a calming effect, as pontus jansson of
inventor oskar van deventer and his love of magic cubes.en used in meditation activities for centuries, and arranging them in gardens or piling them up on top of each other can have a calming effect, as pontus jansson of