Electrical connections

[oldchadders]

Ah all becomes clear.  Its a case of "If play nicely with the little trains and as you get bigger you can play with the bigger trains". Nice touch. 

That's about it. The 5 y/o is a bit young, really, but he has had stern warnings about "health and safety" and even told his Mom "if you come in Grandad's shed, you must ask before touching anything". We had been using an optical tacho to measure the speed of the flywheel on a steam engine, after which he gave his dad a lecture about not looking at laser beams. He is very keen to add detailing to this n-gauge layout, thus the various areas which are on the plan. I think most of the buildings will be left loose and re-arranged every time it is fetched out.

[Bealman]

As Jack9465 says, all becomes clear. Well answered!