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.

The times I spent with my children in nature are among my most meaningful memories-and I hope theirs.

These days, unplugged places are getting hard to find.

Nature is imperfectly perfect, filled with loose parts and possibilities, with mud and dust, nettles and sky, transcendent hands-on moments and skinned knees.

An indoor (or backseat) childhood does reduce some dangers to children; but other risks are heightened, including risks to physical and psychological health, risk to children's concept and perception of community, risk to self-confidence and the ability to discern true danger

In medieval times, if someone displayed the symptoms we now identify as boredom, that person was thought to be committing something called acedia, a 'dangerous form of spiritual alienation' -- a devaluing of the world and its creator.

Passion is lifted from the earth itself by the muddy hands of the young; it travels along grass-stained sleeves to the heart. If we are going to save environmentalism and the environment, we must also save an endangered indicator species: the child in nature.