I'm going as Hermione Granger to see that last movie, how should I dress as her?

I don't look like her but I've got a clock on a neaklace, for a time
turner, Ive made an S P E W badge and covered a book that says
'Arithmancy' on it. I've got a black skirt, stockings, a tie, a shirt
and jumper to wear. But is there anything else I could do? Oh yeh, I
need ideas on how to make a wand or a link to an affordable, realistic
wand. Thanx!