Comment by lbschenkel

Not a joke. When my daughter was younger and we were visiting the daycare (förskola) facilities around us to pick one, in one of them they didn't have a room for children to sleep indoors, they always slept outdoors (even in the winter). This daycare was very highly recommended.

Anecdotally, when my daughter was a baby and had issues falling asleep, all it took was to take her for a walk outside in negative (celsius) temperatures and it was like we gave her sleeping pills. It never failed.

I grew up in a different country, so this whole concept was alien to me and it was diametrically opposite to my instincts, but I have to say that I'm a believer now.