Wooden train peg.
thingiverse
My little ones have this fantastic wooden train from a skilled local craftsman:\r\n\r\nhttp://www.beneschwood.com/product.php?qcc=1006&qcp=1028\r\n\r\nIt relies on sturdy wooden pegs to keep the train intact, yet kids being kids, they often manage to snap those pegs in two. So, I designed a replacement that can be printed with ease rather than painstakingly made by hand, which is indeed very time-consuming.
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