Your KTTK card (your room key, park tickets & dining plan info all in one) which you would show when using your dining plan for the QS meals shows her age because she will also have an adult park ticket. Since the card does not need to be shown when you are paying OOP for TS there is no way they would know her age. I'm guessing she is small for her age if her appetite is small. But let me tell you about our granddaughter's growth spirt during ages 10 & 11...