Layouts For Model Railroads
Make it as big (depending on how much space you have) or as small as you like, it does not matter. It is your model train layout. There are kits that you can buy that determine the length and the shape of your tracks and these are good for beginners or those who are lacking time to setup their own design.
These kits come in all sort of sizes and difficulty levels as well. It all depends on how much space you have, how much you want to spend and how much time you want to expand on putting it all together. It's not a quick process, let me put it that way. It's still very enjoyable and I find it relaxing.
The more pieces of track you collect and there are many many different types of track as well, the more unique and crazy designs you can make. You can even make replicas of real life stations and tracks. There are kits that allow you to do this as well. This are very fun as well. Like a giant jigsaw puzzle.
This of course lends itself to the many different bits of scenery and backdrops that you can also buy for your layouts. Any age can get enjoyment out of model trains and electric trains. My grandfather is nearly 80 years old and loves his model train set that he has. He's been working on new track layouts since I was a kid and that's how long these model trains last if you treat them right, a generation or more.