The world's smallest working model train set has been unveiled – measuring just 1/8th of an inch by 1/4 of an inch.

Measuring a tiny eighth of an inch by quarter of an inch, this carefully crafted piece of engineering is the world's smallest working train model. The five-carriage train, which is 35,200 times ...

You see, this model train set isn't just any model train set. No -- it's probably the world's smallest, most ridiculous and most awesome all at once (all at once).

The sensor was small enough for an N-gauge train, which translates to 1:148 scale or about 9mm from rail to rail. His idea was to build a tiny control board that could fit inside the locomotive ...

The whole thing is just 5.5″ x 12″. This N-scale layout was three years in the making, mostly because [Peter] was waiting for just the right little powered chassis to come along.