Actually, these family-fun cards from Qurious® are made of, you know, card material. But they come in really great, 3-1/2" x 2" all-metal tins with lids. We have (2) different themes. You pick: Space, with explore, match, quiz and spin games for (1) to (18) players; or Dinos, with letters, matching and memory games for (2) to (6) players. Great for the noggin, and easy to stuff into a bag for vacations and long car rides. Ages 3+.