David Kirp, author and Professor of Public Policy at the University of California at Berkeley, visits Google's Mountain View, CA headquarters to discuss his book "The Sandbox Investment: The Preschool Movement and Kids-First Politicst." As the author of fourteen books, David L. Kirp makes the ideal guide to this quiet movement. He crouches in classrooms where committed teachers engage lively four-year-olds, and reveals the findings of an extraordinary longitudinal study that shows the life-changing impact of preschool. He talks with cutting-edge researchers from neuroscience and genetics to economics, whose findings increasingly show how powerfully early childhood shapes the arc of children's lives.