There are a million PVC-based holders and other storage solutions that make use of the ubiquitous plastic piping. Here are two more. To find dozens more, do an internet or Pinterest search.
Wendelbau - Anlagenbau - HAG-Forum
three level layout
we don't have real Trains but N Scale Model Train Scenery like Model Trees, Model Lamps, Model Cars and Model Figures for Model Trains
We're talking boards and bricks here. The last time I put boards and bricks together I got a bookcase. Apparently they're like legos.