Thinking about children's books, prompted by Usbourne thread and remembered reading this in last year of primary school.
From what I remember (and happy to be corrected if I have rose tinted specs on, it was a very long time ago!) It challenged gender stereotyping in a clever well written and engaging way, not at all clumsy or preachy and ultimately celebrated what we might nowadays call a GNC child?
Not sure how it would be spun nowadays, poor Tyke would probably be whisked off to the clinic !