Shakespeare, you need to watch this "performance", it's a true classic, Jerry Lewis in "Who's Minding The Store": http://www.youtube.com/watch?v=a7ySmnxy29Q
The Mayan calendar one is copied from this Rubes panel from 2008: http://2.bp.blogspot.com/_1mzJDzPLfb4/R_7wSwEykLI/AAAAAAAAANg/ST6mF17tGXM/s1600-h/blog-rubes-4-10-08.jpg (I can't find it on his site at http://www.rubescartoons.com/index.html)
It's not a actual model train! There are no individual cars, an operating engine, or anything else that would make it qualify as one. It's a clever hack that sort of ~looks like~ a train. Sheesh!...
http://2.bp.blogspot.com/_1mzJDzPLfb4/R_7wSwEykLI/AAAAAAAAANg/ST6mF17tGXM/s1600-h/blog-rubes-4-10-08.jpg
(I can't find it on his site at http://www.rubescartoons.com/index.html)