The first computer in our house also showed up when I was around this age (although it was the late 80s, so it was a Tandy 1000 running MS-DOS, haha). I think the age factor is an important distinction, since mostly what I am concerned about is not how older kids interact with computers, but how, if at all, younger kids (mine is 3) can have a positive introduction.
There is an overwhelming amount of research coming out from the experts saying that exposure to modern computing devices, as well as TV and video games, can have detrimental effects on young children, including vulnerability to ADHD later on. My own summation/interpretation of this research – and this could be off, this is just my current understanding – is that in their younger years children are in a critical period of synapse development which primarily requires sensory-based interactions in the physical world. From what I’ve read, it seems that the abstract level of engagement of digital devices actually inhibit or potentially limit this synaptic development from occurring. And the best-case scenario seems like there is just literally no benefit to the youngest children.
My own interest in this subject is not to argue that babies should use iPads (there is enough evidence to show this is not the best idea), but how and when young children should be introduced.
This is not a huge source anxiety for me, it’s more like – as a geek, anything that has a large portion of my interest (parenting in this case), is something that I am just bound to deep dive into, because that’s just how my brain works. I’m aware that being slightly obsessed with parenting itself probably is enough effort on my part that my kid will end up relatively well-adjusted. (If anything, I struggle to curb my innate tendencies away from this comically negative drone-like focus.)
I do find it interesting that so far in this thread there are actually way more people who have interest or concern than have clear, tested strategies that they feel confident in. This suggests that not only is this a hot topic for many of us, but also one lacking clear solutions.
I look forward to discussing this more and also reporting back as I come across additional reading on this subject.