BOGOTÁ, Colombia — As class begins at Sanitas University, a cohort of young men gathers the supplies they'll need for the lesson: a plastic doll, rash ointment and diapers. Felipe Contreras, 30, their ...

"Why would you want to do a thing like that?" my dear husband asked me. I was showing him a Web page with instructions on how to make cloth diapers. How could I explain that despite the fact that they ...