They don't call it the "terrible twos" for nothing. In fact, the age of 2 is just about when tantrums begin as children start to explore their independence. For both parents and tots, it can be a time fraught with frustration, trying to understand one another. But it doesn't have to be this way. Global parenting expert Jo Frost, best known from ABC's "Supernanny," has some tips to navigate these turbulent times in her new book "Jo Frost's Toddler Rules: Your 5-Step Guide to Shaping Proper Behavior." Frost says by following her five rules of disciplined parenting, you can ensure a happier and more peaceful household. She'll explain more on "Sanjay Gupta MD," Saturday at 4:30 p.m. ET and Sunday at 7:30 a.m. ET.