Look at this fractal object

Solid object show different appearance from different direction. In particular, this fractal objects have beautiful appearances, like snowflake and dendrite. This fractal is based on a hexagonal bipyramid called H.

It looks square from each of the faces of a hexagonal bipyramid. Therefore, in 6 (or 12 if the opposite direction is counted twice) different ways. This is twice the number a cube has. When it looks square, we have 9 x 9 grid. The 81 pieces of this object are colored with 9 colors so that in all the six square appearances, all the rows, colums, 3x3 blocks contain all the 9 colors. It is "Fractal SUDOKU Object".

This is a remake by Yasuyuki Tsukamoto of an object build in 2007 and exhibited at Kyoto University Museum. It is portable object; light and tough.