Just wondering, why aren't they eating a lower-carb diet as well? It benefits everyone, not just those who are trying to lose weight. You could let them eat everything you eat plus maintenance foods: lower sugar fruits (berries and melon), beans, very limited whole grains (optional). Cutting out sugar and white carbs is healthful for everyone, including kids.

BTW, I've seen Lindt 99% in either Walmart or CVS. I can't remember which. When I was maintaining my weight, I'd have a square of Lindt 85% every now and then... Endangered Species 88% bars were by far the tastiest! I used Lindt 99% for baking.