$15; $13 (ages 65+ and students and military with ID); free (ages 0-5 and to all third Thurs. of the month 5-8); $40 (family, two adults and up to four children under 18).
Station: Convention Center/S 15th
Tues.-Sun. 10-5 (also third Thurs. of the month 5-8). Closed most major holidays; phone ahead to confirm schedule. Allow 1 hour minimum.