If you buy a
DDP package with an annual pass, you aren't required to buy a ticket. But you'd also have to register your child on the reservation as being 10 years old to get her an adult dining plan. The child's AP is not relevant. The package requires the presentation of one adult AP at checkin. If the child is the only one who has an AP, you can't use it for the reservation, but if all you want is to upgrade her dining plan, then what you need to do is register her on the reservation as 10 years old. Doesn't sound like they will ask to see her AP, just the adult's.