By TONY EVANSExpress Staff Writer Wood River High School senior Erica Evans wants to help children in Cambodia make art. Photo by David N. Seelig Students in the Wood River Valley have a growing tradition of doing good things for the world. They found nonprofit groups, travel abroad to help out with non-governmental organizations and contribute philanthropic ideas to the local community. Erica Evans, a senior at Wood River High School, has plans to bring the gift of art to children...