Calibron 12 - Theodore Edison's 1933 Wooden Packing Puzzle Unique Gift Idea a rotating wooden replica of

a rotating wooden replica of the ancient Mayan timekeeping system

bat (from ash just like real bats)

perhaps younger with more focused kids

and instructions/solution sheet

Calibron 12 - Theodore Edison's 1933 Wooden Packing Puzzle Unique Gift Idea a rotating wooden replica ofCalibron 12 is a wooden packing puzzle designed in 1933 by Theodore Miller Edison, the youngest son of Thomas Edison, an MIT trained physicist who held more than 80 U. S. patents and founded Calibron Industries in West Orange, New Jersey. We build this faithful reproduction at Creative Crafthouse, our family owned wooden puzzle and game shop, and make every set in our Hudson, Florida workshop. The goal is to arrange twelve wooden pieces into a single