3D Tic-Tac-Toe

How to Play:
The player can win by getting 3 in a row on any level, up and down on one pole or diagonally over 3 levels.

Parts:
14 'O' Pieces (1" by 1")
14 'X' Pieces (1" by 1")
4 by 4 inch board
(Pieces can be stacked 3 by 3 by 3)

Disclaimer:
The sketchup file for the 'O' doesn't print very well, use the stl one unless you plan on remixing.