More than a quarter of Philadelphia students visit corner stores twice a day, five days a week, according to a new study from Temple's Center for Obesity Research and Education. "In my opinion I think it's really interesting that a child can spend a dollar and get 350 calories on average at any one trip to a corner store," says Stephanie Vander Veur, a clinical researcher at Temple. "It's pretty amazing, if you ask me." That is one reason, she says, why half of all the children living in America’s cities are overweight.