A very interesting and well written book on the significance of spontaneous play (not teacher-directed or adult-controlled) in human development and the urgency for today's children to take their time playing freely, if possible far from adult interference and supervision, whenever possible physically and outdoors.
A useful warning against "the current emphasis on formal learning and over-use of mediated experiences - tv, video, computer games- which can deprive children of immediate sensory encounters with the real world." and in general against accelerated learning and the cult of early adulthood.
Encouraging an active childhood and clearly explaining its benefits for children.
Very inspiring!