I don't think they do, but I would call the number in the following.
Chicago's Free Trolley
Chicago's Free Trolleys offer daily service to some of the city's most popular museums, shopping destinations and visitor attractions. From Memorial Day through Labor Day, the free trolleys will travel to and from Navy Pier, the Museum Campus, Lincoln Park Zoo, Michigan Avenue, State Street and the Chinatown/Pilsen neighborhoods, with many stops in between.
Each trolley route is served by trolleys accessible to people with physical disabilities. Most trolleys are wheelchair accessible. For more trolley accessibility information, please call 1-877-CHICAGO (1-877-244-2246) or TTY (866) 710-0294. Most trolleys run every 20 minutes, and provide convenient connections to CTA, Metra and Amtrak stations. The Metra/Shopping/Museums/Navy Pier Lines (Green, Gold, Red):Hours: 10am to 6pm, seven days a week.The Navy Pier (Blue Square) trolley runs daily during Pier hours. The Lincoln Park Shuttle (Brown Circle) and Express (Purple Diamond) trolleys operate from 11am to 7pm weekends and holidays.The Chinatown/Pilsen (Orange Octagon) trolley operates from 10am to 6pm weekends and holidays.
Chicago's Free Trolleys are easy to use. No ticket or reservation is needed - simply catch a trolley at stop marked by a "Free Trolley" sign. The Free Trolleys are marked with signs in their front windows. Riders must board 30 minutes before service ends. For operator assistance, call toll-free 1-877-CHICAGO (1-877-244-2246). For information on trolley routes visit
www.cityofchicago.org/transportation