A few examples of games.... Actually, Dr. Chang mentioned one.
Just tracking your steps made people walk more. People are educated if they do a step game or a step challenge that tells them they need to have 10,000 steps today. When you get to 9,500, instead of turning into your house, you walk around the block one more time until you get to 10,000. I've heard stories of people, once they got home, going up and down their stairs until they got to their goal of the day. From a male standpoint, men are competitive, and a good part of the game is just pitting one person against another. It can be as simple as getting points for general nutrition, getting points for doing activities, getting points for answering a health question. We're giving them knowledge, but it's the points that drive them, and the desire to stay ahead of their friend.