We teach our children to say please and thank you, but how can we teach them to be truly grateful for what they have? This hour, we'll talk about cultivating a sense of gratitude in our children and ourselves and the positive impact that being grateful can have on our lives and the lives of those around us. Guests are Kimberly Greder, Professor of Human Development and Family Studies at Iowa State University, and Mary Jane Ryan, author of "Attitudes of Gratitude: How to Give and Receive Joy Everyday in Your Life."