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Pairs well with our Dime Dilemma
Penny Drop is invented and handmade by Creative Crafthouse in Hudson
576 ways to align the rings (over a million)
From the starting positions lasered into the base of the board
They turn on a strong nylon bungee cord
Safecracker 50 Wooden Math Brain Teaser | Difficult Puzzle for Adults police gifts for him Pairs well with our DimeSafecracker 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
