That largely depend on what characters your children are drawn to.
While not having any kids of our own, we have found that Chef Mickey's in the Contemporary and Crystal Palace in MK were fabulous. CP features Pooh and friends whikle the former is obvious.
If the DD is enamored with princesses and you don't mond paying a few extra bucks, you might consider CRT but if you trip is inside of 6 months, you might have a hard time scoring the ADR.