I do, vaguely, remember relatives from the US visiting us in Scotland when I was a kid. It must have been in the early 1960s and my parents and just about everyone they knew were amazed that they could take colour photographs.
We do tend to think of colour photography as a fairly modern technology, but it was actually developed in the mid C19th and had become a practical proposition by the early C20th. Kodachrome - which was used for these images - was available shortly before WW2 and I think there were some competing systems around.