Train sets are a good way to start in the hobby and they can make great presents. There are three categories of trains sets, Ready-To-Run Sets, Train Sets and Rolling Stock Sets. Ready-to-Run Train Sets have everything you need to start your journey into model railroading. These include track, power, locomotive and rolling stock. Train Sets include just a locomotive and rolling stock. Rolling Stock Sets consist of only rolling stock, this could be extensions to existing sets, unit sets or mixed freight cars.