Parents, you know how it goes: every time the kid wants to download an app from the iTunes Store, he has to bring you the phone so that you can type in the password. That sort of defeats the purpose of giving him the iPhone so that he's distracted. Fortunately, you can set up an iTunes allowance, which lets you specify a precise amount of cash that your kid can spend on apps without having to bug you each time he wants to try out a new iOS game. The allowance works just like an iTunes gift card, and can be used to purchase music, iOS apps, and Mac apps. It's easy to set up--we'll show you how!