With the standardization of the kids menus (result of the
ddp) you'll be hard pressed to find something other than burgers, chicken and pizza.
Actually, there are quite a few varied choices for kids in Epcot.
Coral Reef: Grilled Mahi Mahi, Smoked Fish Chowder or Lobster Soup
Sunshine Seasons: Sweet and Sour Chicken, Mini Sub
Cantina de San Angel: child size beef burrito
Chefs de France: Croquette de Boeuf En Brioche (just kidding, that's a burger
)
Alfredo: Spaghetti Al Pomodoro, penne pasta with cream and parmesan cheese
Le Cellier: steak
Nine Dragons: sweet and sour chicken, fried rice and spring roll
Marrakesh: beef kabob
Rose and Crown: shepherd's pie, bangers and mash
San Angel Inn: burrito, chicken quesadilla
Tempura Kiku and Teppanyaki: shrimp or chicken, grilled or tempura with vegetables
Yakitori: teriyaki chicken with veggies
Those are all in addition to the regular offerings of burgers, pizza, chicken strips, and mac & cheese, and those look a lot better than most of the rest of the choices in the other parks.