When Tink is in her house and Peter goes to see her she is in her everyday fair outfit. When then when she gets big and breaks the house it shows her in the nice dress that she was in before. I know that she has powers, but to change that fast...I dont think so!
Good greif...you and the hairstyle person. Did you think it was a slipup when Cinderella's rags magically changed into a ballgown? Cause that's the samething we got going on here. Tink gets big and says, "Oh, dear me, I did it. This is the only wish that I ever wished for myself..." Her wish was to be big and beautiful. She magically wished herself tall, into a ballgown, and gave herself a pretty, fancy hairstyle. It was her wish. She didn't "change" clothes, she wished herself into them.