Support WBURA Parenting Paradox: How Kids Manage To Be 'All Joy And No Fun'Play07:40Download AudioNPR StaffJanuary 24, 2014 ShareAs a parent, how would you rate this moment on a scale of 1 to 5? In her new book All Joy and No Fun, Jennifer Senior says parenting research sometimes fails to quantify the joy of having a child. (iStockphoto)