Hi Carrie,
Les Chefs de France is one of our absolute favorite restaurants at Walt Disney World. My picky eater (12-year old) son loves it.
On my most recent visit to the restaurant, they also served breaded chicken strips with spaghetti for kids. My son loves the toasted ham and cheese sandwich on the adult menu.
The current menu for kids at lunch and dinner:
Breaded chicken strips served with pasta
Ground beef steaks in a brioche bun, served with French fries (it's a hamburger)
Pan roasted flounder served with green beans and tomatoes
Orange Roughy
All items offered at lunch are available at dinner for kids too. Feel free to mix and match. If the kids want a hamburger with pasta, just ask. If they'd prefer a large serving of pasta only, tell your server.
While Epcot restaurants offer some exotic cuisine, the restaurant will do their best to accommodate picky eaters, families with food allergies, etc.
Enjoy your meal in France!