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but it is more difficult
and a few options every teacher will recognize after a long week
on a floorboard box that resists scratches and water far better than ordinary wood
Made in our Florida shop
Items include
Safecracker 50 Wooden Math Brain Teaser | Difficult Puzzle for Adults black friday sales but it is more difficultSafecracker 50 is a handcrafted wooden math brain teaser designed and built by Dave Janelle and the family workshop crew in Hudson, Florida. Five rotating rings (one base ring plus four top rings), laser cut from maple and cherry hardwoods, with deeply laser engraved numbers. The goal is to align the rings so each of 16 vertical columns sums to 50. There are exactly 1,048,576 ways to align the rings (over a million). Only one is correct. Palm sized at
