Any interesting watches or articles to read on the effects of dumbphones on kids?
Especially early on, 6 and under.

Will soon be a dad. And while I will be conservative about his access to devices, I still think it's important that it be learned, as everyday life depends on being able to speak the "language" of the current dominant technology.
By seeing pros and cons, I can think of a more solid plan.

Videos like this https://www.youtube.com/watch?v=2VkNWLYD5c4 suggest that finer motor skills get improved by phones.
The comments are a buffet of downsides. But it's just anecdotes, I want properly-structured content about the topic.