"The babies who nap in sub-zero temperatures"

[v_s_c]

Би-Би-Ся пишет о Стокгольме и "окрестностях".

http://www.bbc.co.uk/news/magazine-21537988
"...
"Babies clearly slept longer outdoors than indoors," says Marjo Tourula. While indoor naps lasted between one and two hours, outdoor naps lasted from 1.5 to three hours.
...
According to her research, -5C is the best temperature for an outdoor nap - though some parents she spoke to even put their children out at -30C.
..."

Подтверждаю. Лично проверено на 3 дитенках. ;-)