Everyone in the room has to be on the same dining plan. At the restaurant, however, you can use your dining credits, but pay for the children out of pocket and use the TIW for their meals and anything else (e.g. adult beverages ) not covered by the dining plan. If your kids are "Disney Adults" (10 and older) you can use their extra credits for adult meals at other restaurants, Sigs and dinner shows. If they are 9 or younger, the credits can be used at the same places, but only for children's meals.