We as parents are our children's first and best role models, and this is particularly true when it comes to their health. ...We can't lie around on the couch eating French fries and candy bars and expect our kids to eat carrots and run around the block.

I had the honor of meeting a young Pakistani woman named Malala Yousafzai, who was shot and nearly killed just for trying to go to school. I also heard about how nearly 300 girls in Nigeria were kidnapped from their school dorms in the middle of the night. There are girls like this in every corner of the globe. In fact, there are more than 62 million girls worldwide not attending school, and that's an outrage.

Our kids didn't do this to themselves. They don't decide the sugar content in soda or the advertising content of a television show. Kids don't choose what's served to them for lunch at school, and shouldn't be deciding what's served to them for dinner at home. And they don't decide whether there's time in the day or room in the budget to learn about healthy eating or to spend time playing outside.

When I was little, I wanted to be a mother, because that's who I saw. I saw my mom caring for me. I didn't play doctor. I didn't play lawyer. I didn't have those visions until I was in college, meeting people who were doing those things. That's why we're trying to encourage moms, teachers, fathers, to be that presence in their children's lives, in their communities, because it really makes a difference.

One reason we planted the White House vegetable garden was to set an example about what food can mean, but to also begin a broader conversation about how we're feeding our kids, what they know about the food that they eat, how they're taking care of themselves.

Childhood obesity isn't some simple, discrete issue. There's no one cause we can pinpoint. There's no one program we can fund to make it go away. Rather, it's an issue that touches on every aspect of how we live and how we work.

When I'm unhappy with something, people know, because I don't want to hold on to it. I'd rather deal immediately with the stuff that bothers me, so using my network - my girlfriends, my husband, my mom - I talk a lot, I vent.