I had a train as a child, Lionel, have no idea of the size.
Smallish 8-10 inch cars. It was on a board on in the basement. But all it did was run around an oval. Had no
houses or things, and never gave a thought to making any.
Just never saw one, I guess, so did not know it could be
done, being only about 8 years old. Could have done so
with cardboard and other stuff, if given the idea. But they
are fun. This friend has a "huge" garage and is converting
the "attic" part of it into a display.

----please, draw me a sheep----