Hi Denise,
I think that you'll find that most of the dining locations at Disney World are super kid friendly and do offer a children's menu. I ate at Les Chefs de France in October and really enjoyed it! There is indeed a kids menu at Les Chefs. There were several kids at our table and they all seemed to enjoy their meals. I think most of them had breaded chicken strips served with pasta but there were other choices as well.
Disney does list some of the menus on their website but I didn't see one for Les Chefs. You can find the menu on
www.allears.net. Its an unofficial Disney website but they do a great job of posting menus.
Hopefully you'll be able to get reservations when Chef Remy from Ratatouille is making an appearance. He makes the rounds 4 times a day, 6 days a week, visiting Guests from atop a rolling chef's cart as he dances, laughs and even says "cheese" for photos! We got some super cute pictures of him.
Please feel free to visit us as often as you'd like during your planning. It is our pleasure to assist you.
Wishing you minnie magical memories :-) Allison