If you or any young folks love locomotives, choo-choo over to South Philly for a ride of a lifetime at the Polar Bear Train Show and Sale. New and antique trains and parts are up for grabs at nearly 150 tables and track layouts are on display with many other kid’s activities and prizes. 9 a.m. to 1 p.m., $5 per person. Penn’s Landing Caterers (Sheet Metal Workers Union Hall), 1301 Columbus Blvd., 610-872-3309, ADTCA.com.