Why is it that the best and brightest of our children are arriving at college too burned out to profit from the smorgasbord of intellectual delights that they are offered? Why is it that some preschools and kindergartens have a majority of children struggling to master cognitive tasks that are inappropriate for their age? Why is playtime often considered to be time unproductively spent?

In Play=Learning, top experts in child development and learning contend that the answers to these questions stem from a single source: in the rush to create a generation of Einsteins, our culture...