This is a good question and something I've been thinking about lately. I can't see my kid getting anywhere near of an explorative and self-learning experience that I had in the 80s with the tech available today.
I've begun to think that learning what's hard and important about computers, and experimenting, doesn't require a computer. A computer is just one kind of sandbox. Building a structure, fixing part of a car, these have more in common with our experience of tinkering with computers than anything offered now by the social media world. Really, computers should be just another kind of mechanical thing you know how to work on, build, take apart, etc. It's what's being delivered over them these days that's poison.
I was just given a BASIC manual around 1977 and started writing software, been doing it ever since.
I would have loved an FPGA dev board as a child, plugging TTL chips into a solderless breadboard was fun but there is a limit to the size of circuit that you can build.