Indented Happy Good-Luck Boxes

Folded from three pieces of origami paper. Kunihiko Kasahara's indentation of Molly Kahn's Triangle Box, as modified by Michael G. LaFosse. We find this variation much easier to build for beginners than its granddaddy, Molly Kahn's triangle box. "The free points ski down the white glaciers, one under each of the ledges."