. >>> this time on "spark" -- first, "spark" follows environmental artist daniel mccormick as he creates temporary sculpture in the creek beds of west marin. >> it's becoming less and less a work of art and becoming more and more of a work that nature is responding to. >>> next, the firebird youth chinese orchestra offers chinese-american kids a chance to play the traditional instruments from their homeland. >>> then, artist jaime guerrero translates imagery from his mexican heritage into blown glass. next on "spark." >>> major sup f