double dominoA double-12 domino set; One marker per player, plus a marker for the Mexican Train (e.g., a quarter or small object) Objective. The goal of Mexican Train Dominoes is to be the first player to playDouble 12 Dominoes. Our personalized dominoes are the world’s finest. Made from an exclusive blended resin & polished to a silky smooth finish, each domino looks & feels of ivory. Double 12