Thank you Karen and Doreen for your replies, very helpful. I went out and bought the Carbohydrate Addicted Kids book---am overwhelmed, really don't know how to follow this one, it's much more complicated than the adult one. It takes a lot of planning, many of the recipes are not really "kids' taste" and there are no good substitutes for all the fruit and other snacks. Snacks are things like meatballs! And as for baking these breads and muffins at 6.45 a.m! Of course I haven't had time to read the whole book, but I have had a good look through the recipes. I think I will need to just use my own judgement, let them have whatever they want at school (they are both repulsed by the junk food served there so they go for baguettes, which may actually not give them enough carbs) and think up low carb meals at home. The biggest problem will be getting the younger one off his incessant fruit eating.
I think we have a challenge ahead of us!