Hi,
Carb counting isn't too difficult to learn. This sample booklet tells you how to do it.
http://www.ndr-uk.org/Diabetes/Introduc ... ook-1.html It's probably meant to be used alongside a dietitian but it sets out how to do it.
( chamki ,
I don't know what sort of insulin your child is on .If they are on twice daily mixed insulin they will need to have similar amounts of carbs for each lunch.
Even if they are using a rapid insulin for meals you may not want to create problems by having varying carb content so
for just learning to carb count skip to p4 and then ignore the second part from p22 about how to adjust bolus insulin . )
Many people also find the carbs and cals book or application very useful.
I found a couple of examples of packed lunches for children with T1 online. Unfortunately, both from the US so some of the things may not be available (and I think both have a few things that are a bit overprocessed) but they give some ideas.
Oh and I've reread them , Personally, as an adult, I would be wary about including neat orange juice myself as in the second example. They tend to be very fast acting.
http://spoonful.com/type1/a-week-of-per ... unch-boxes
http://www.battlediabetes.com/articles/ ... betic-kids