We are 2 adults and as i am a light eater i take a kids meal, on our last vacation we paid €6.10 a meal and than on our last day it went up to €7.50 i think.
My husband figured for himself that if he takes 2 kids meals he gets 2 fries, and 2 different burgers and a drink during the meal and a bottle of water for later in the day, and the dessert, it is cheaper than a adult meal.