because I know from experience that gym classes can often be boring, or repetetive, leading kids to cutting class or slacking. Schools are very sports-oriented, but what about students who don't play sports, who prefer alternative exercise methods? The music is loud and has an excellent beat, making it attractive (along with the flashing lights and the "gameplay" aspect) to students of all ages. It promotes cardiovascular health, strong muscles, flexibility, rapid movement, eye-foot coordination, and having fun... an excellent game to promote good health!