California Railroad Museum in Old Sac is a favorite spot for kids (and adults) of all ages. The museum has more than 225,000 square feet of space for exhibits and lovingly restored railroad cars and locomotives. Starting March 3, it will offer twice-daily 45-minute excursion train rides along the Sacramento River on Tuesdays. (Normally, the rides are offered only on weekends and holidays.) You get your choice of seating: in a vintage coach or open-air gondola. 125 I St.