Ice cream – is it simply fat and sugar-laden junk food or is there some nutritional goodness? How much is healthy for ourselves and our children, and how much is too much? Not surprisingly, the United States consumes more ice cream than any other nation. So, Carolyn Robinson investigates if low-fat ice cream is a healthier option, if sugar is addictive and if it's making kids hyperactive. She also discovers a surprising mystery ingredient...