We make our own "lunchables:" cheese, crackers, and lunch meat. I bought a lunch container at Target that has separate little compartments for each item (crackers get soggy if you mingle them with the ham and cheese all day.)
I have also made cheese quesadillas and sent them for lunch... yes, my daughter will eat them cold!
Other healthy lunch items: Gogurt simple (no added colors), nuts or trail mix, "cuties" (those little tiny oranges), sting cheese sticks, carrot sticks, apple slices.
A neat trick I learned: if you cut up apple slices and soak them in apple juice ahead of time, they will not turn brown, even if they sit in the lunchbox all morning. Same idea as lemon juice, but doesn't taste like lemon juice!
I try to have a protein, a fruit and or veg, a dairy, a carb, and a drink in the lunchbox. I don't pack a dessert b/c my daughter likes to have a "100 Calorie Pack" as her after school snack.
I read somewhere that kids this age actually like the routine of eating the same things every day, so don't be alarmed if your child gets stuck on a particular lunch combo.
Happy school year!