Ive read the books, and im still wondering bout this one. And of course, why you cant grow your clothes, when it becomes to small. And why Harry is allowed to use magic at the Grave Yard in book 4, and the Ministry in book 5. Oh and in Hogsmeade in book 3. And wtf is the rules for Conjuring Spells? If Dumbledore can Conjure chairs, why do you need to buy stuff then?