interesting! Do you control a character, who controls the train?
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Potentially, then there's the possibility to drive different ones. I've always found it interesting how in Thomas & Friends, the engines are their own characters. In earlier books it's more vague how much control the driver and fireman have, and to what extent they're wrestling with the personality of the engine. In later books and TV series, the drivers may as well not even be there, it's practically the engines themselves driving around and talking to each other.