Erm, I have one too, well I prefer "model railway" but in my case everything is in boxes no layout and they haven't been touched for years.
Coming back to the model of the pen it always surprises me how big scale models are (I know that sounds daft). What is it made from?
I used to use Kappa Board, secondhand from the marketing dept where I used to work.
I like making things and get the bug every few years. Still got a cupboard full of unmade 1/35 scale tanks and assualt vehicles. As the eyesight is getting worse the detail work becomes harder and the scale goes up. 1:1 soon!