When were trains made?

Answer 1

Mainly steel. It's needed for its strength, esp wheels & rails, also frames & couplers.

Of course there's wood for the ties (or concrete) and passanger cars are often aluminum to save weight.

Then you must add all the "minor" stuff: glass, fabric, etc.

Answer 2

they are very fun to make and are really boring

Answer 3

trains go way back into 1929 even before then. But the trains now are more high tech then the shabby rusty scrap back then.