http://www.funis2cool.com - The world’s smallest operational train set is a “real” miniature object, it is built on a scale of 1:35200, and measures just 1/8 of an inch x 1/4 of an inch. The best part certainly is that the set is functional, even with that small size. Made by David Smith, the model has a five-carriage train traveling around an oval route.

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