The Defense department has gone on the offensive against obesity since it's landmark "Too Fat to Fight" study from 2010 (which you can access at the link provided). 75% of young adults do not meet the military requirements of fitness. 50 years ago, the concern was vitamin intake. Now, it's poor food choices and inactivity.
D.O.D. has some good online resources which you can find on the link above. They include nutrition and activity ideas for families, not just soldiers. Basically, they are making the case for national security by encouraging a healthy population. Can't fight if you're not fit.
One of the best suggestions from the article is slowing down from the fast pace and thinking more about what you are eating, as well as budgeting time to prepare fresh meals instead of frozen ones. It also suggests that "kid-friendly" meals are too chicken nugget and pizza heavy. Preparing foods yourself allows the family to have better decisions into how the food is prepared (less salt and fat, more fresh/raw foods, whole grains).
One final suggestion was limiting TV and computer time. So that's it for today- put down the internet based device you're holding and let's get moving!