Tower of Pi Hard to print? Probably... But definitely worth every digit! If you have a FDM printer, try the one with the solid walls first. My third contribution to pi day March 14 (03.14). This is a part of a series of towers/penholders made out of digits. Tower of Pi: http://www.thingiverse.com/thing:271769 Tower of Tau: http://www.thingiverse.com/thing:295304 Tower of Euler: http://www.thingiverse.com/thing:783098 Tower of Phi: http://www.thingiverse.com/thing:788653 Pi - Penholder: http://www.thingiverse.com/thing:271353 Please have a look at some of my other things: http://www.thingiverse.com/roman_hegglin/designs/ https://www.youtube.com/watch?v=3BKinCbMzXc