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The gears have 37 teeth
A challenging and artistic puzzle for the fashion designer or sewing expert
your all-in-one answer to these common problems
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10 Penny Puzzle | Coffee Table Game gift for teenager The gears have 37 teeth10 Penny Puzzle is a handcrafted wooden brain teaser that looks trivial and is anything but. Lay all ten pennies flat inside a shallow recess that seems too small to hold them. The opening is precision cut so the coins fit only one way, which turns a handful of change into a real puzzle. It is a hands on take on a classic recreational math problem, circle packing: fitting equal circles into the smallest possible square. Ten is a famously awkward case,
