Google's Ngram Viewer reports the incidence of specific words or phrases throughout history by scanning a lot of books, etc., to determine if, when, and how popular a word was/is in the print media.
Here are the trends for "toy trains" and "Lionel trains" - not sure what they mean but an optimist like me finds something positive here: maybe we're not in the golden postwar age again, but things don't look too bad.