A trainyard.

We build our own blocky ltrains on some train tracks whether it be big or small, even make a station too if you want, that can link to other maps!

That can't be done, How would the train lead to other maps? The only way to get trains on the Demo are mods, even then I don't think it would work.

You could have portals in the train. And to make it even more creative, when you enter the portal it will say, Destination ______ Arrival time 3 hours I would think that would be very neat. You could even make it the main world.

And then use triggers to get the train moving? I'm still not sure how to make stuff move in the demo, Since we don't get Redstone.

Well, the trains wouldn't move. And even in beta it would be very complicated to make "trains"

They don't nessarily have to move like mudge said, just have a portal block at the train's controls or exits and let that end up sending you to a station.

yea, thats what i was going at

But wouldn't that completely destroy the train effect? We might as well just stick with "Main", or expand it.

I know but it's an optional thing to do for kicks. since we can almost always go anywhere with the /g command.