What do you get a teenager for her birthday? It's not as easy as it used to be when you’d run into Target, grab a few dolls and be done. There's the obvious, over-the-top expensive gifts like a phone or iPod. But what if you have a budget? Or simply don't want to give into peer pressure? Here are some suggestions from someone in the know: Olivia, my daughter, who is turning 13 in a few days.