Everyone has that friend. You know the one. They're fun, cool, and think a little outside-of-the-box. So when their birthday rolls around you want to give them a special treat to encourage that geekery you love so much. My friend is Liv and she is a huge Harry Potter fan. So when her birthday rolled around this year, I gave her the one thing I knew she'd love, henna. But what could possibly be better than henna? Harry Potter themed henna, featuring the Deathly Hallows.