Kielbasa and cheese sounds filling if they’ll eat it. It’s so difficult to get a good balance of fast/healthy/will get eaten/affordable.

At my kid’s school they do a “share table” so if other kids don’t eat an item from lunch, they can put it in the share table. There’s always apples, oranges, sometimes crackers. It’s relieving to know there’s something available for a snack if whatever I sent struck out.