Things You'll Need
Instructions
Go to the toy store or hobby store. The toy store is likely to sell wind-up trains, called "tin plate" trains. The hobby store will sell a more complicated, electric model train set.
Decide how extensive a set you want. For a child, a simple circular track without much scenery will probably suffice. For adults, things get more complex.
Decide on a scale. The common scales for model trains, ranked from largest to smallest, are O, S, HO and TT. HO is the most common scale.
After you've chosen a scale, decide whether you have enough room for it in your house - or if you need a smaller scale. Reconsider as necessary.
Buy a small amount of track, the necessary switches and plugs, an engine and a few cars to start. If a kit is available, start that way, making sure those basic components are included.
Ensure you have enough curves and can lay out a complete circuit.
Stop by a hardware store and pick up a table for your set or wood to build one.
Leave room for expansion.