Description
Have someone pick a number from 1 to 16 and these amazing alder wood cards will quickly determine the number. The secrets of these long lost cards were found in a 1942 book by Maurice Kraitchik called Mathematical Recreations. They are also called window cards and have a fun magical edge to them. Each card is 1.3″ x 4″ x 1/8″ thick alder wood with the numbers and text deeply laser engraved.
Sold by: Puzzle Master
