I thought Ferraris were show-off cars for the rich, and if you were rich enough to have one, and had a child, then you would (sensibly) own a separate, functional car when you actually intended to drive that child around (or employ some car/chauffeur service or whatever).
Edit: I googled Ferraris with back seats, and got this article which opens by acknowledging that people don't expect them to exist or for Ferraris to be kid friendly, so I think I (and the heavily downvoted GP) can be forgiven for harboring this misconception.
>>Adam Merlin, President at Merlin Auto Group, confidently answers, “Every time I speak about Ferraris being kid friendly, people think I’m nuts. And for the most part, I am. After all, even Ferraris that do have back seats often require the rear passenger to sacrifice leg room, so you can imagine peoples’ reactions when I allude to fitting car seats back there. However, after trying a plethora of Ferrari models, I can confidently say there are models you can choose from, if you have a family and still want to spoil yourself by driving a Ferrari.”