For buffet meals, a child under 3 is free and can eat from an adult's plate. We did this for two trips when DD was under 3 and it worked perfectly. In fact, she ate from her own seperate plate both times.
Have a great trip!
KIDS UNDER-3 EAT FREE "411":
1) TECHNICALLY, there is such thing as a "kids-under-3-eat-free" policy.
. . . no where in ANY Disney brochure is this mentioned
. . . there is no such policy
2) But, when done per policy, they eat almost free.
3) And, based upon CM discretion, they can eat free.
4) The official rules:
. . . kids under three can eat off the adult's plate
. . . if they order anything, like milk, they are supposed to pay for it
. . . if they order any food, they are supposed to pay for it
. . . this is anywhere, including buffets
5) What really happens:
. . at buffets & AYCTE kids actually "eat buffet food free"
. . . . . . adults could get the food, instead and give it to the kid
. . . . . . the adult could claim it is their plate kid eats from
. . . . . . they might as well have a drink, for same reason
. . . . . . it's tough to determine it was theirs or their parents
. . . . . . thus, kids can have their own plate and beverage without charge
. . at non-buffet, servers can determine if they ordered food
. . . . . . it is easy to tell if they got a drink
. . . . . . the server usually charges for food ordered for the kid
. . . . . . the server usually let's the drink go, but not food
. . . . . . the server, at their own discretion, can charge for beverage
6) So, to wrap-up, in practical terms
. . . at non-buffets, kids under-3 eat without charge ONLY from parent's plate
. . . at buffets & AYCTE, they can actually take food from the buffet table or separate plate
. . . at all meals, items are ordered for the child "might" be charged for them