The woods were my Ritalin. Nature calmed me, focused me, and yet excited my senses.

What would our lives be like if our days and nights were as immersed in nature as they are in technology?

A widening circle of researchers believes that the loss of natural habitat, or the disconnection from nature even when it is available, has enormous implications for human health and child development. They say the quality of exposure to nature affects our health at an almost cellular level.

Now, my tree-climbing days long behind me, I often think about the lasting value of those early, deliciously idle days. I have come to appreciate the long view afforded by those treetops. The woods were my Ritalin. Nature calmed me, focused me, and yet excited my senses.

Nature is often overlooked as a healing balm for the emotional hardships in a child's life. You'll likely never see a slick commercial for nature therapy, as you do for the latest antidepressant pharmaceuticals. But parents, educators, and health workers need to know what a useful antidote to emotional and physical stress nature can be. Especially now.

The future will belong to the nature-smart...Th e more high-tech we become, the more nature we need.

The dugout in the weeds or leaves beneath a backyard willow, the rivulet of a seasonal creek, even the ditch between the front yard and the road-all of these places are entire universes to a young child.