Step it UP

Saw this link to workout tech, gadgets that monitor your movement and exercise and graph it online.  http://www.nytimes.com/2009/12/17/technology/personaltech/17pogue.html?_r=1&nl=technology&emc=techupdateema1  Made me think of the "Step it Up" project.  These still aren't geared towards kids like that one is.  I think the idea of getting points or helping set goals is a good one.  I've found that product design for adults tries to keep away from "childish" things like that, but I think adults respond to that type of thing almost as well as children do if it's positioned right.