The National Parent and Teacher Association and 40 Non-Profit religious, consumer and educational groups have opposed radios being installed on school buses.  Their problem isn't music, it's the advertising.  Channel One, the company that installs the radios free of charge do play commercials but restrict what is played, ommitting toys, video games, candy and soda ads.  One bus driver, Sue Riesling, said the experience of having a radio on the bus has actually helped stating, "They want to hear the music, so they’ll sit and be quiet,” she said. “As soon as they do that, they know the radio goes on and we’re in business.”