Volunteer naturalists are sought to help with a children's program one morning each week from mid-September through mid-May, and for other interpretive work with visiting groups. Volunteers work 50 hours per year after training. Training starts from 8 a.m. to 1 p.m., Tuesday, Sept. 6, and continues from 8 a.m. to 1 p.m., every Monday, Sept. 12 through Dec. 12. $100. RSVP by Wednesday, Aug. 31.