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. Also look for our other more complex version of the cards on the website.
Difficulty level: n/a
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The in store location isn't a puzzle, but a set of coordinates to help you and our staff locate the item in our store. The item might be located in more than one place or could be in an area you don't have access to. If you have any problems locating the item, please ask for assistance and one of our friendly staff will help you.