The Endless Landscape. A Toysmith "toy" for ages 8 & up. From the box: "The 24 cards can be laid side by side in any order to create a perfectly harmonious landscape every time. There are exactly 1,686,553,615,927,922,354,187,720 combinations, including the permutations that only use 23 cards, 22 cards and so on. The Endless Landscape, or Myriorama as it was known, was a popular curiosity during the last century. This version is closely based on one published in Leipzig in the 1830s." A gift from Lisa B from A to Z.