Penn Hills teen Jackie Seltzer is dedicated to keeping kids warm this winter. She is one of the corps of volunteers with the 17th annual Mister Rogers’ Neighborhood Sweater Drive, hosted by The Children’s Museum of Pittsburgh through Dec. 16. “Seeing this young lady as someone who believes in the mission, just like we do, and is working hard toward that goal, is something to take notice of,” says Stephanie Aaronson, , co-chair of the Community and Special Engagement Committee for The Children’s Museum of Pittsburgh Ambassadors: Kids at Heart.