even at traditional preschools in Scandinavia it’s extremely popular to let the youngest children sleep outside. Come nap time, it’s common to see a long line of prams with napping babies lined up against a wall outside, and in Denmark some preschools even have a special sheltered area with stationary pram-like bassinets where the youngest children sleep. And preschools that skimp on outdoor nap or playtime can quickly draw the ire of parents, who expect them to provide it.