Wikipedia:Department of Fun/Word Association/Cubic Association

Welcome to Cubic Association! This game is a three-dimensional version of Ultra Association. The game begins at cell (1A 1A) and ends with (5E 5E). In this game, words must associate with words above and left(two-dimensionally), as well as the word in the level above. For example, the word in cell (3B 3D) must associate with the words in (3A 3D), (3B 3C), and (2B 2D). The first column, first row, and the first "pillar" ((2A 2A), (3A 3A), etc.) only have to associate with the previous word. The words on Level 1 only have to associate with two words (as in Ultra Association). The words in the first columns and rows of each level must associate with the previous word as well as the level above ((2A 2D) must associate with (2A 2C) and (1A 1D)). A word must exist in the level above before a word can be played in the same square in the next level. Think of the five levels as five layers of a cube, with associating going down as well as along the "up and down" of the individual levels.

Note: the individual levels are not branches. Only play a single word.