I used to do that as a kid.
I’m going to mention some other things in case any of the rest of them ring a bell.
Eventually, it was a constant running commentary “I’m running along now, I’m going on the swings now”.
At the time I was very, very energetic and also had a lot of wakefulness. My parents saw the doctor about my wakefulness after a time when I was about eighteen months old and I didn’t sleep for two or three days. It wasn’t
uncommon for me but they were exhausted.
The doctor said I was fine, they should just let me play quietly so they put toys in my cot so I could be a safe contained environment but still have some interactive stimulation whilst they were sleeping. They also gave me a nightlight (well in the seventies it was leaving the hall light on and leaving the door ajar) so I could see what I was doing to an extent and not get scared in the dark.
The running commentary went away when I learned to read, at about age two/three. A health visitor told me my mum she wouldn’t get any peace until I was reading so as she was an English teacher she taught me how to read. I became much less active.
What happened was the external commentary it became an internal commentary because learning to read in my head rather than out loud helped me bring the thoughts inside.
I was a voracious reader as a child/teen, partly as a way of switching out of my own thoughts and partly as a way of seeing the world from the perspective of others. I particularly enjoyed (and still do enjoy) books with internal narration. I also used to read a lot at night if I couldn’t sleep, again with the lights off but the hall light on.
I’m still largely a verbal processor, meaning I do better making sense of things and coming to decisions by talking them through, although I can do it via an internal process it just takes longer and can be more stressful.
Diagnosed with autism and adhd in my mid forties and working towards a diagnosis of a sleep disorder, possibly delayed phase sleep disorder or non-24 hour circadian rhythm.
To be honest whilst I did and do love reading, I often wish they’d just let me be a bit more hyperactive and talkative for longer rather than hyperlexic, as I think I would have delivered habits more suited to me.