The Boy, the Grandad and I went to the local model railway society show today. We go every year as its a great place to pick up specialist tools (we all need a tiny anvil), and some of the layouts are pretty damn stunning.
Just so happened though, that today one of the displays was a working Adeptus Mechanicus freight yard, complete with lights, remote control doors and working rolling stock.
As the Boy has just discovered 40K he was rapt with it, all the more so when they let him drive the train.
I've attached a couple of pics, they don't really do it justice but hopefully give a flavour of it and perhaps some inspiration.