Take a breather from the Michelle vs. Michelle banter and head on over to the letsmove.gov for the real experience. What I like about letsmove.gov is that the user experience taps into the elementary senses of touch. This site works no matter which platform you use to access it. It's clear, concise, and scaffold in a way that takes the user through an educational experience and helps him/her to grow along the way. Reading from left to right you see the stages: Learn the Facts offers education up front. It tells the user that learning is the most important aspect to this site. (see Fitt's Law, which to sum up in UX terms is that information (a target) is presented in a distance that is comparable to its significance; left to right).
Obesity is a challenge, and if a user has come to site it is to learn more about what they can do to prevent it, control it, and (mind the pun) shape it. The spectrum of the navbar is first to educate (Learn the Facts), slowly adopt healthy choices (without being overwhelmed)(Eat Healthy), apply (Get Active), then empower (Take Action and Join Us).
I know we call that taxomony in my field, but my education experience also makes me want to call it pedagogy. The color coded and subtitled navigation has a button-like feel that reminds me more of the big push button toys that I grew up with or what you'd see in a child's nursery. This feeds into our need, as Western users, to touch in an elementary way. There's less user thinking involved upfront in terms of work, but also worry. Meaning that obesity in a country, America, where nearly one in three children is overweight, can be a struggle...it can be daunting in terms of self-esteem and medical problems. All in all, if you've made it to the site, you've already taken a step in the right direction without being berated with statistics and literature with links not telling you where to go or what to do, which usually results in more despair and confusion.
Let's move doesn't even harp on obesity being the core experience...the messaging is "what should I know?," "what should I do?," "how will I do it?," "how can I get others to join me, or how can I join others who are 'moving'?".
This blocked navigation type is not going away, gone are the days of trying to scroll up-and-down trying to find a link we need or desire, it is now about touch, get, go, do. Letsmove.org, and First Lady Michelle Obama, design achieves that.
Note: (I know that research has suggested that users are used to scrolling, but western users read left to right, making scrolling counter intuitive in searching for information).