Best food to travel with that don't need refrigeration?

We are going on a short vacation and my son isn't a great eater. Does well with PB&J, chicken nuggets and milk. What is easy to pack that we can throw in a backpack to feed him, instead of paying the high prices for food that he won't eat? We have the milk covered with the drink boxed milk, but what else can we do for food?Author: laurie0802Source:

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