The sandbox investment : the preschool movement and kids-first politics / David L. Kirp. Kirp, David L. Education, Preschool Political aspects United States. Education, Preschool United States Philosophy. 372.21 22 KIS Includes bibliographical references p. 271-316 and index. Cambridge, Mass. : Harvard University Press, 2007. 2007. 2007 Text 333 p. ; http://www.loc.gov/catdir/toc/ecip0713/2007009624.html eng United States. United States