It's a cube puzzle with black and white pieces representing positive and negative space in three dimensions. On a difficulty scale of 1 - 10, it is a 10. Mind-boggling. But once you get it, it's easy. It is a design statement by itself. Rearranged, it is art. It is a construction toy with an infinite number of possible constructions. Enjoy! Measures 2.2 x 2.2 x 2.2 in.