I packed things like Vienna Sausages, Cheese sticks, crackers, and a juice box. Or the Toddler style Lunchables/Snackables.
Single serving size of Mini Ravioli, Spaghettios, Chicken and Rice, they have them on the pasta isle and the infant isle with the baby food. You can add fresh veggies and/or like carrot sticks, blue berries, grpaes cut inot 1/4" to 1/2" pieces, some crackers to add to the grain servings, single serving fruit cups, and you can always send juice boxes.
We do refrigeration by putting the blue cold packs from our freezer into the lunch bag and then each day we would sanitize the lunch bag with the "any surface" cleaner (just make sure it gets clean and then completely dry brfore closing up) and refreeze the cold packs. Then you can use cheese sticks, tippy cups with milk, pudding or jello, yogurt, lots of other options once you supply the cold.
So, if you have a food pyramid posted on your frig like I do then just think about each area.
Grain: Pasta, bread, crackers, rice, cereals
Veggies: Spaghettios is advertising their serving of food now has a full serving of veggies in them, they have tomato sauce, pieces of carrots, with other veggies cooked down
Fruit: 100% juice is a serving of fruit, the single serving size fruits are already cut up into bite size peices and the Mandarin Oranges are very easy to eat, even if they don't have teeth, the pears are usually very crunchy to me though.
Protein: Each food that is processed like Vienna Sausages have other things added int hat makes them Questionable. The kids don't get them every day or even every week so I don't think they're all that horrible.
I looked up the food pyramid for toddlers and fothis web site, it has sample menu plans and snack ideas, etc...here's a link to that.
http://www.mypyramid.gov/preschoolers/index.html
Heres another link to bby center with an age by age feeding ideas for kids. Just make sure any of the things you use are cut up into 1/4" (for example sticky things that gum up on your teeth like raisins and figs) - 1/2"( for example soft things that aren't gummy/sticky like grapes or the peaches in the single serving cups).
http://www.babycenter.com/0_age-by-age-guide-to-feeding-y...
My favorite cookbooks are:
Baby and Toddler Meals for Dummies
Idiots Guide for Feeding Your Baby and Toddler
You can check at the library and get them inter-library loan if they don't have them in the library. That way you can read them and see if they are something that will help you.