"STOCKHOLM — Something was wrong with the Penguins, the incoming class of toddlers at the Seafarer’s Preschool, in a wooded suburb south of Stockholm.
The boys were clamorous and physical. They shouted and hit. The girls held up their arms and whimpered to be picked up. The group of 1- and 2-year-olds had, in other words, split along traditional gender lines. And at this school, that is not O.K.'