It was a fateful day that Campus Candy founder Mark Tarnofsky dropped his daughter off at Indiana University about four years ago. On a mission to track down a simple candy bar, the dutiful dad found himself roaming far afield until he finally landed at a distant drugstore. Convinced that college kids want candy within constant reach, Tarnofsky started his first store right there, and soon expanded to the schools in Wisconsin, Arizona, and Pennsylvania. Each outlet sells more than 500 different types of candy, all of which may be repurposed as toppings on a rotating menu of frozen yogurt. By slinging bulk candy at a fixed price, Campus Candy stores make it easy for college kids to load up on diverse desserts without filling their schedules with bonbon-making classes.