What can I bake for lunch boxes instead of pricey cereal bars?

[Queenofknickers]

I am complete novice at baking but trying to find a way to cut down on the sugary, transfat-laden cereal bars that DCs like in lunch boxes plus save money! No nuts allowed in school and neither like flapjack - had anyone got any recipes please?

Muffins are easy and cheap, there are a million different varieties and you can make savoury ones and/or adjust the amount of sugar if you want to. I make a big batch and freeze them, then take out as needed before school.