a850137f_e_Mathematical_Sciences___PIMS__main_features
[game] 3D tic-tac-toe [# to play] 2 [multi- level?] no [made by] various, or make your own [main features] 
spatial reasoning; there are various versions, including on-line; much more interesting than the 2D version, as you can keep playing until all the pieces are used up, then count the number of rows of three; outcomes are not easily predicted
Math Games for Holiday Gifts | Pacific Institute for the Mathematical Sciences - PIMS
main features