my daughter has been diagnosed for 7yrs now and is almost 11...
diagnosis takes adjustment for all the family...
our saviour has been some of the following which are all free: strawberries, carrot sticks, cucumber sticks, cherrie tomatoes, cheese slices, cherrie boccincini all of which make it to the lunch box for extras for just in case she is starving...
some other carb options are home made fresh popped pop corn, 6 salada squares, 6 x savoy crackers with or without vegemite, dried banana slices, (careful though dried fruit can be high in carbs ~ so not much volume for carb content.
when she is "SO STARVING she could die" I suggest she first have a drink of water with or without lemon juice and then 15mins later if she is still starving, we try a snack then and we can usually manage her hunger without overloading carbs...
life is more difficult when she has a growing spurt as food increases and then so can her BGL's but we can up activity to help balance that out...
best of luck with your family's new chapter