Hi, if they really love Pooh and friends the crystal palace is lovely. It's nice and light and, although I've never done an evening meal there, the food we've had has been great. This is buffet style - choose what you eat.
Liberty Tavern has a set menu which is meat based, with macaroni cheese, I think this may be thanksgiving type food (not sure being from the UK). Here you can meet Pluto, Minnie, Goofy, Chip and Dale, all in costumes that you won't see anywhere else. This is a table service restaurant.
As the children are young I probably would go with CP! The LT has more of an evening sit down meal feel to it though.