From odemagazine.com:

The Humana Foundation capitalized on these two key issues to create a video game that encourages kids to exercise – outside. It’s called The Horsepower Challenge. Created to fight obesity, the game involves a pedometer that measures the steps of kids and uploads the count wirelessly to the web, so that the kids can even play outside while participating in the challenge. Several schools can compete with each other for the highest total steps, and each individual can customize his or her horse character with new colors, hairstyles and accessories with money earned by their step count. Also, the race measures participants’ progress along a path of world landmarks, sneaking a little geography into the mix.