that was into model railroads... and for something like 15 years now they have this "modular layout" model train club where people build a suitcase sized "tiny scale" ( N or smaller ) scene where the tracks enter and exit at particular places at the edges... so you go to a club meeting, bringing your suitcase, and hook your module landscape to other peoples module landscape... and watch your tiny scale trains run around a much bigger universe.
I don't know much else about it.
https://www.nmra.org/introduction-layout-modules
WHAT IS A MODULE?
A module is a portable section of table type structure which is but one part of a large group of like tables which when all assembled together form a large and fully operating model railroad. They are built by individuals as part of a home layout or specifically for use interfacing with others in a large setup. All are built to a set of standards that allow each unit to interface exactly with other units anywhere in the overall system. A module may be a single table or a group of tables which must be capable of interface at each end but may deviate between these ends so long as the type of operation is not compromised or restricted. By being portable, they may be disassembled for transporting to conventions or public displays. Many clubs are formed for the specific purpose of building module layouts as space for a permanent layout is hard to find and is very expensive when available.
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