I am a geek and I’m not ashamed to admit it. I’m also not ashamed of the amount of my free time that I spend playing “Lego Harry Potter: Years 5-7” on my iPad. I have been waiting for this app since the game was released for most game systems last November. Thank you, Warner Brothers, for providing yet another way to explore J.K. Rowling’s magical world. For $2.99 (for a limited time; it’s usually $4.99), you can take part in this adventure and defeat Lord Voldemort with Harry and his friends.