Travelling to Hogwarts

I have decided to create an Hogwarts Express in which every cabin recreates, for each school year, an iconic scene of going back to Hogwarts.

• First year: Harry and Ron become friends, they buy the whole cart of sweets and Ron tries to turn Scabbers yellow.
  
• Second year: Harry and Ron chase (or they are chased?!) the Hogwarts Express in the flying car of Arthur Weasley. I imagined that, in the train cabin just below them, Hermione, Ginny and Neville were travelling together serenely.
  
• Third year: the Hogwarts Express is attacked by dementors. Harry faints while the professor Lupin casts the spell “expecto patronum!”
  
• Sixth year: Draco finds out that Harry is spying on him, he petrifies Harry and leaves him alone, hidden by the cloack of invisibility. Fortunately, Harry’s head was full of wrackspurts!! that Luna sees with her spectrespecs.