Families sing, listen to a reading of The Polar Express
, have pictures taken with Santa in front of Locomotive 1673, and write letters to the North Pole with the help of elves from the postal History Museum, from 2 to 4 p.m., Saturday, Dec. 21; free. At 6 p.m., the film version of The Polar Express
is shown. Visit tucsonhistoricdepot.org
for more information.