I tell this to my girls all the time: This journey we're on is a once - in - a - lifetime opportunity.

For the first time, the nation will have goals, benchmarks, and measureable outcomes that will help us tackle the childhood obesity epidemic one child, one family, and one community at a time.

Fruits and vegetables for some kids are scary and not fun.

One thing that I've learned from male role models is that they don't hesitate to invest in themselves, with the view that, if I'm healthy and happy, I'm going to be a better support to my spouse and children. And I've found that to be the case: Once my kids were settled, the next thing I did was take care of my own health and sanity. And made sure that I was exercising and felt good about myself. I'd bring that energy to everything else that I did, the career, relationship, on and on and on.

My husband and I make physical activity a priority in our lives, and our daughters love being active as well. And while we each have sports and activities we enjoy, we try to go for hikes or bike rides together whenever we get the chance. We've found that the best way to help our girls be active is to find activities they truly enjoy.

One of the things that attracted me to Barack [Obama] was his emotional honesty. Right off the bat he said what he felt. There are no games with him - he is who he appears to be.

All of us are driven by a simple belief that the world as it is just won't do - that we have an obligation to fight for the world as it should be.