Window displays, another lost art from the past. Shopkeepers used to decorate their store windows to attract customers into their shops.
Bob's Five & Dime always had a few mechanical figures decorating a Christmas tree in the window. Santa and Mrs. Claus, and an elf, always making the same motions, but real magic in the eyes of a small child.
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Leidig's Bakery filled their windows with mock wedding cakes from Spring to Summer, and replaced them with Gingerbread houses for the Christmas season.
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The Patapsco Pharmacy displayed large glass amphoras filled with colored water. An amphora is a container that cannot stand up without a separate stand. As I recall, it was used in ancient Greece to assure the return of containers to be refilled with olive oil or wine.
More about The Patapsco Pharmacy.
I am sure there were others examples that I have forgotten, perhaps a reader will remind me of them.