A.R.
My kids like pita pizzas. Split the pita as if you were making a sandwich, the add 2-3 Tbs of pizza sauce, veggies or meats of choice, and finish with cheese. Bake it on a foil lined pan (or pizza stone) for a crisper pita, or microwave for a few seconds, to heat through and melt the cheese. Can be eaten hot or cold.
My son also likes to take peanut butter and apple sandwiches for school lunch.
Good luck!