Stop Dot

Made by Mattel in 1969, this game is a sort of 3-D tic-tac-toe with a twist. It sort of looks like modern 3D art work with its bright colors. It is played on the outside faces of a 3x3x2 block, so there are 36 positions on which to play (the bottom side is not used). To win you have to make a straight row of five dots in five different colors, without putting any dot next to a dot of the same color. The row of five must be orthognal, not diagonal. Obviously for 5 places it has to cross at least two faces. 3-4 player variant too.