My sister-in-law, Sara, throws a big Hogwarts party for each of her children when they turn 9. She goes ALL out. The entire house is decorated. She has people come dressed up as the professors at Hogwarts and teach a class. This year, I was Professor Trelawney and taught... "the noble art of DIVINATION!!". Mitch was Hagrid and took the kids to Diagon Alley. Cherie was Professor Sprout and taught Herbology. Adam, my nephew, was Porfessor Snape and taught Potions. Sara was Professor Mcgonagall and led the kids through their Hogwarts experience. And "he who shall not be named" (aka B-rad) was Professor Dumbledore.
Here is a glimpse into our Hogwarts experience....
Hagrid & Dumbledore
Professor Sprout & the cutest little red head to ever enter Hogwarts!
Potions with Professor Snape
The scenery...