Jury out on Zamzee, other forms of 'gamification' Read more: http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2012/02/25/BUTT1NBGD2.DTL#ixzz1oXSLWjwR

a pocket device that measures physical activity, awarding points in a game scenario boosted physical activity in kids by about 30 percent. This article looks a game principals and the implications of incentivizing certain kinds of tasks.