To bring at school for snack, nut bars are very useful: they are very nourishing and easy to eat and to keep in a box.
You can find several brands in the commerce, but there are always some non desirable ingredient: glucose syrup, cereals, preservatives, etc.
In order to get a GAPS diet compatible nut bar, it’s necessary to do it at home. Here I suggest you some examples.
Mix all the ingredients together, grind them a little bit if necessary before.
Put in small rectangular molds.
Keep in the fridge.