Book excerpt: Cutting edge scientific research has shown that exposure to the right kind of environment during the first years of life actually affects the physical structure of a child's brain, vastly increasing the number of neuron branches—the "magic trees of the mind"—that help us to learn, think, and remember. At each stage of development, the brain's ability to gain new skills and process information is refined. As a leading researcher at the University of California at Berkeley, Marion Diamond has been a pioneer in this field of research. Now, Diamond and award-winning science writer Janet Hopson present a comprehensive enrichment program designed to help parents prepare their children for a lifetime of learning.