Spray counter lightly with non-stick cooking spray. Flatten each roll into a 3-4-inch circle. Place on a sprayed baking sheet. Top each one with about 2 teaspoons pizza sauce. Poke each one several times with a fork to prevent bubbles from forming.
Bake at 350°F 8-10 minutes. While pizzas are baking tear 1 string cheese for each pizza into thin strips. Remove pizzas from oven and place 2 olive slices on each for eyes. Layer cheese strips in random fashion to resemble mummy bandages. Trim any strips that are too long.
Return to oven and bake an additional 1-2 minutes to melt cheese slightly.