3-D Tic-Tac-Toe

A curious mix of "4 in a row" and "0's & X's" Unlike the normal version of Tic-Tac-Toe, this board has stacking poles. This means you can't just think about whats happening horizontally on the board, you also have to think about what's happening vertically as well. The aim of the game is to get 4 of your beads in a straight line, be it going across or going up. Board diameter 20cm approx.