My children really like a snack plate for "lunch". I usually just throw whatever we have in the fridge/pantry on a plate around 10am and leave it out until it is all gone. It might consist of: cheese, raisins, sunflower seeds, carrot sticks with dip, nuts, apple slices, berries, 1/2 pb&j, etc. . . I do try to make it have some protein, a veggie, and some fruit.