All aboard for the Annual Whistle Stop Train Show! This Williamsport tradition has been going on since 1979 and is a full service train show. All sizes of electric trains will be on display and for sale. This is the Main Line of PA Train Shows. Bring the kids to see Santa. Don’t be sidetracked! Admission is only $3.00. Children under 12 are free. The show is always held on the first Saturday in December.