Members of the board of directors of the Mahoning Valley Historical Society preparing to welcome visitors to the fifth annual Memories of Christmas Past exhibit at the Arms Family Musuem, which opens Saturday, are, from left Dr. William J. Cleary, Marilyn Oyer, Tricia Perry, Bill Lawson, MVHS executive director, and Bob Calcagni. Exhibit hours are 1 to 5 p.m. Tuesday through Sunday. Admission is $6 for adults, $5 for seniors and $4 for children. A preview party will be from 5 to 7 p.m. Friday. Cost is $16 for members and $20 for guests. Reservations can be made by calling 330-743-2589.