Just wondering what to expect for pricing.
Expect adult pricing.
It's difficult to justify paying $40 for a buffet when a 10yr old child eats a couple chicken fingers and a slice of pizza.
Exactly the issue for plenty of adults. So you look at the overall cost for the family’s meal and see if the total works out for how much people will eat and how much people will enjoy it.
For our family, my son was eating two restaurant entrees before he was 9. If we all ate that way, buffets would have been terrific for us even after he turned 10.
But his dad and I don’t eat that way at buffets.
So then we had to look at enjoyment. I don’t like characters and don’t care about them. I have zero personal enjoyment factor there. My son had about 80% enjoyment until he was 11 when it plummeted. His dad’s enjoyment level was and is high.
So each character meal/aycte idea had to be thought about. For us, Tusker House hits the mark for food and experience, but no others did. For me and my cousin, going to the Bon Voyage meal after Princess hits the mark. Her enjoyment of the characters is through the roof. And it was her birthday.

So, really, you have to look at it all and not base it on what any one person will eat. Did her enjoyment of the time, including food taste and character fun there make up for the money spent?
That may be so, but that's what the price is. If this is a problem, one probably shouldn't go to buffets where they are going to charge the light eating 10 year old the full adult price.
Yep.
My grandnephew who will be w/ us at WDW this summer will turn 9 during the trip. His mother already said she's sending his ID as he's tall for his age.
No need. 9 year olds rarely have ID. My son hit the 99th percentile for height about 2 years ago to where even the TSA asked him for ID on our last domestic flight. Just like experiences at Disney, he told them his no-ID-needed age (with his deep voice) and we moved along. Just tell them his age. No biggie.