Train Crates are special items in Pocket Trains that allow the construction of new trains and cars. There are two different types of train crates: special and regular.
Special crates contain parts to rare trains such as the Mallard. Each Train Crate contains a random Part for a train, and costs 10 Bux to open. The player has a choice of constructing either a Train or Fuelcar once they have collected enough parts.
Train Crates can be delivered as jobs to destinations, purchased if a Station currently has a sale, bought from the store, or randomly collected while a train is travelling to a destination, although this is uncommon (when train is moving, a train crate may appear with a parachute attached, as would flying coins and bux).
Looks like a train is passing by a Train Crate plantation!
Train Crate as a Job.
A Special Crate is a 'premium' version of the Train Crate, and is used to unlock parts for 'special' or rare trains. Special Crates are generally rarer than Train Crates, and are only obtainable through the completion of a Daily Event, leveling up, or from being purchased at a Station that has a sale on Special Crates (26,000 coins each).