Tour Hibbing Taconite, a working iron ore mine, Thursdays, June 24 through August 19. Bus departs from Minnesota Discovery Center parking area at 1 p.m. Admission is payable in MDC lobby and does not include musuem admission. For safety reasons, this tour is only available to ages 10 and up. No photographs are allowed. Safety gear provided. Pre-registration strongly recommended. Call 800-372-6437.