Trevithick Locomotive Model with Paper Gears

Though not as well-known a name as Newcomen or Watt, Richard Trevithick was a British inventor and engineer who built the first working railway steam locomotive...in 1801!

Here's a great site that features a model of Trevithick's steam locomotive. The paper gears are very nicely done (as is the entire model).

You can see a gallery of the model and download .PDF plans to make it yourself (for a $5).