SKOWHEGAN — When Margaret Chase Smith’s name was suggested for the new $1 coin in 1998, a fourth-grade girl at Benton Elementary School was so taken with the idea that she made a larger-than-life wooden coin painted silver with the likeness of the late U.S. senator from Maine etched into it. The coin, made by Tia Nichols of Fairfield, has been kept at the Margaret Chase Smith Library in Skowhegan – Smith’s hometown – ever since.