If you have not been in an alternative bookstore lately, it is possible that you have missed the news about indigo children. They represent perhaps the most exciting, albeit odd, change in basic human nature that has ever been observed and documented," Lee Carroll and Jan Tober write in "The Indigo Children: The New Kids Have Arrived." The book has sold 250,000 copies since 1999 and has spawned a cottage industry of books about indigo children. In "The Indigo Children," Mr. Carroll and Ms. Tober define the phenomenon. Indigos, they write, share traits like high I.Q., acute intuition, self-confidence, resistance to authority and disruptive tendencies, which are often diagnosed as attention-deficit disorder, known as A.D.D., or attention-deficit hyperactivity disorder, or A.D.H.D. "These children are the answers to the prayers we all have for peace," said Doreen Virtue, a former psychotherapist for adolescents who now writes books and lectures on indigo children. She calls the indigos a leap in human evolution. "They're vigilant about cleaning the earth of social ills and corruption, and increasing integrity." Marjorie Jackson, a tai chi and yoga teacher....said that schools should treat children more like adults, rather than placing them in "fear-based, constrictive, no-choice environments, where they explode."