I would feel very mean if I didn't let my dc make their own packed lunches, I'm a SAHM and they get a sense of pride being able to do it all by themselves. My 3 y.o would do it too if he could!
My dc make sushi rolls, they love the paper thin nori (seaweed) and their friends always ask for it so they take in plenty!
Also, dd takes in a baked potato with mustard, mayonnaise and chopped onions, in fact their own imaginitive combinations are amazing and they have fun experimenting with new tastes.
Their ages range from 6-11 and make their own packed lunches in the morning before school. We sometimes bake our own rolls (dough from breadmaker)but rice or potatoes make a nice change. They also pick some fruit from the garden (raspberries are in season now)and take them in a little pot.
They help write the shopping list and get to choose what's for dinner, we get out all the colourful recipe books and they go through them writing down the name and page number of things they'd like to try.
Has been quite interesting choices across many continents!