Visit the annual Christmas Doll & Train Exhibit, learn about the classic trains, toys and more; write a letter to Santa, read a holiday book or try your hand at operating the model trains. Daily noon-4pm thru Jan. 3 (closed Dec. 24-25), St. Clement’s Island Museum, Colton’s Point, St. Mary’s County. $3 w/discounts, Facebook: @SCIMuseum.