Binary 3D printed numbers. Zeros (ellipses with a hole) and ones (straight lines) at the places where you expect them to be in a binary number. Six bits again, so 2⁶=64 binary numbers from 000000 to 111111. 3D printed on my Creality3d ender 3 v2. Coded in @openscad.

3D zeroes and ones, 6 bits, 64 pillars