Ma & Pa caboose By Angela Cotey | October 12, 2015 | Last updated on August 7, 2025 Email Newsletter Get the newest photos, videos, stories, and more from Trains.com brands. Sign-up for email today! Get Updates Maryland & Pennsylvania four-wheel caboose 2003 — a little car with a big number — whiles away the day at the Ma & Pa’s Baltimore terminal in May 1955. William E. Warden Jr. photo Comments+ You must login to submit a comment