These simply have to be the best POP! Rides released to date. All 3 parts of the Hogwart's Express can be connected to make on continuous train, and into the bargain each comes with a figure unique to this set of Harry (complete with mended glasses), Ron or Hermione.
The Hogwart's Express engine with Harry Potter POP! Ride stands around 12 cm tall by 15 cm long. Packed in an illustrated window box.