Staff member Mickey Miller decorates a 12-foot Christmas tree in the drawing room of the Gordon-Roberts House at 218 Washington St. on Tuesday morning as the museum prepares for the holiday season. An open house is scheduled Friday from 3 to 5 p.m. The Queen City Transportation Museum, 210 S. Centre St., will hold an open house Friday from 7 to 9 p.m. Children may make a gift and wrap it in a Made by Elves gift bag. Regular hours for both locations are Tuesdays through Saturdays from 10 a.m. to 4 p.m., with house tours on the hour. For more information, call (301) 777-8678 for the house and (301) 777-1776 for the museum.