That depends? My first swimming lessons were in Kindergarten when I was 4-5. We were visiting public baths "unsupervised" (they still had lifeguards of course) by the time I was 8.

Assuming the kid wasn't even planning to enter the water, I see no inherent problem here. We seem to be operating on the assumption that unsupervised children will immediately succumb to sudden and irrational urges to kill themselves in creative ways.

> We seem to be operating on the assumption that unsupervised children will immediately succumb to sudden and irrational urges to kill themselves in creative ways.

That’s like 90% of parenting until kids age out of it. That being said, my 2.5yo kid can swim well enough today that I’d have no qualms at all about them being at a neighborhood pond by themselves in a few years.