At Gregory in Seattle’s suggestion I did a Google images search on “LEGO ad 1970s” and sure enough…compared to the present they look like a lost utopia.
Note the caution – when it’s a girl and boy together, the girl is smaller and younger than the boy. It wouldn’t do to have a dominant little girl, even though there are in fact some families in which there is a girl (or even more than one) who is older than her brother.
But all the same. Utopia, I tells ya.