Members of Boy Scout Troops 355, 2109 and 117 of the Baltimore Area Council earned merit badge credit at the Whitman Baltimore Expo here this weekend. The Scouts learned how coins are made, the active U.S. Mint facilities and grading systems, among other numismatic topics. The Kids' Korner at all Whitman Expos welcome Scouts either in organized groups or on their own, as well as children of all ages.