As the American mother of a 4-year-old girl, with a French husband, I’ve gotten a chance to see playtime from both sides of the pond. Over the years, I’ve also gained a new set of both French and American “mommy friends,” who often pepper me with questions about whether the French truly parent better, as Pamela Druckerman argues in her book “Bringing Up Bebe.” While I’m hesitant to take part in such a “who’s better than whom” parenting war, there’s one place where French parents have it right: that is, in their attitudes and rules about children’s play.