Separate AERO Milk Big Bubble Bars into pieces with 4 bubbles in each portion; set aside. Preheat broiler to high. Arrange 10 graham wafer squares on a foil lined baking sheet. Top each with a marshmallow.
Broil for 60 to 90 seconds or until marshmallows are lightly golden brown. Top each with a piece of chocolate. Cap with remaining crackers and serve immediately.