The Barns & Noble LEGO Harry Potter Mini Hogwarts Express “Make and Take” event was yesterday and the instructions have been shared online.
The Mini-Hogwarts Express consists of 43 pieces which you can find on Bricklink easily.
Upon closer inspection, the one used for the Barns & Noble event is exactly the same model that was use in the LEGO Dimensions Harry Potter Team Pack (71247).
So if you were not able to get the LEGO Dimensions pack when it was still available, this is your chance to make one of your own. The instructions for the Ford Anglia is also on the LEGO instruction database if you are looking to replicate that as well.
(Via Reddit and The Brick Fan)