I'm sure it depends on the kid, but my children at least use enough iPad apps that they are quite familiar with the standard gestures and UI controls. For adult

I'm sure it depends on the kid, but my children at least use enough iPad apps that they are quite familiar with the standard gestures and UI controls. For adults it's quite frustrating when an application doesn't use the platform standards - like when a button doesn't look like a button, or if a menu works in some nonstandard way. It isn't interesting, it's just annoying. Kids who are iPad-savvy seem to feel the same way about bad UI as adults who are familiar with their iPhones.