They will let you order whatever you want. I was just there on Saturday, April 30, for lunch with my mom and sisters (all adults by the way) and we all ordered from the kids menu. We had eaten a big breakfast and didn't want a big meal at lunch and of course we wanted to have one of their yummy cupcakes. The CM, at the kiosk, who took our order didn't care at all that we were all ordering from the kids menu. I was surprised to find it even included a soft drink, bottle of water or milk.
It was plenty of food and we were very happy with it. Two of us got the kids turkey sandwich meal, one got the grilled cheese and tomato soup and one got the kid's braised pork meal. They even let my sister substitute the sweet potato fries with regular fries (pomme frites). They are very accommodating!