Tesseract

[Click and drag to move the camera, zooming by mouse wheel.]

Tesseracts (a hypercube in four dimensions) are very fascinating to me - now with 3d printing it is possible to create the 3d shadows of the four dimensional bodies.
For this I created a STL file with the help of python code to define the coordinates of a pleasing rotation and OpenSCAD (to calculate the 3d hull) and got it printed in brass (and a small in silver) at Shapeways - with quite a pleasing result: