Lacking a specific genre, I am calling my kids steampunks.

What does that term really mean? One meaning online : a style of design and fashion that combines historical elements with anachronistic technological features inspired by science fiction. So then I need to define anachronistic: belonging or appropriate to an earlier period, especially so as to seem conspicuously old-fashioned.”she is rebelling against the anachronistic morality of her parents”

Well, the heads definitely look old fashioned and the designs combine elements inspired by science fiction. So Steampunks it is!