3D Dominos is a game played with 32 rectangular prisms made up of two cubes fused together, then colored on the exposed faces in one of two colors. Under pressure of a sand timer, players try to match up faces on a growing three dimensional structure, maximizing their scores by matching the most faces in the most difficult places. In addition to the pieces and sand timer, the game includes a serpentine scoreboard and scoring tokens in four player colors.