My son and I are taking our first steps into modelling. He's only 5, so it's nothing too serious, and there certainly won't be any particular focus on portraying a particular time period or real-life location or anything like that - but after going to some exhibitions, he's very particular that he wants to move up from toy train sets and into models. No scratchbuilding or painting (until he's older, at least). So I'm after some advice on how to start. We've got a Hornby OO starter kit, a second hand Flying Scotsman, and a couple of IKEA cabinets to use as supports for a baseboard. We'll probably want to plan for slow expansion but keep running a working layout in the meantime. What sort of things should we be looking to do as we lay our first pieces of track? What pitfalls might we not have thought of? What do you wish someone had told you when you started building your first layout? Any advice and tips will be gratefully accepted!