Rubik 2x2x1

A twisty puzzle like Rubik's cube but only 2x2x1 in dimension.
Well, it's not really a puzzle, as it is very trivial. At least it can be a consolation for those who cannot solve the regular Rubik's cube.

Requirements:

  • Lego Technic pin (part ID 2780 or 3673)
  • Colored label stickers (cut to 18mm)