21 Piece "Tetris Cube" Puzzle (+decorative box)

Do you have that one friend who can solve any puzzle they lay eyes on? Drive them crazy with a "simple" 3D puzzle this holiday season! Each of the 21 tetris-inspired pieces is unique, yet they fit together into a perfect 5x5x5 cube. The full cube is 4cm to a side with a unit block size of 8mm. If you get stuck, click through to the guide image which shows you what the cube should look like (outside looking in) when finished.

Note: The box is necessary to contain the pieces during the printing process, and doubles as a decorative storage box!