I realise it's probably not what you're looking for but the best answer is to let her start her course and see what kit they use. It's really advantageous to get used to one platform and use it consistently. The college may even get educational discounts or hook her up with their supplier.
I know nothing beats opening a big box on a birthday, but having done similar it's waaaaay better to take your time and get it right than make guesses or go with someone else's preferred kit that may be poles apart from her day-to-day solution. Get her a small pressie and a voucher saying "one graphics tablet" :)
I used to use a Wacom but only as an enthusiastic amateur rather than a pro.