sentences:  On arrival at one of the five or six stop points, an approximate five-minute broadcast through the car's radio (tuned to FM frequency 100 MHz) provides a narrative commentary explaining interesting aspects of the surrounding area.The commentaries are pre-recorded on microchips and broadcast using concealed low power transmitters charged by solar panels.Some of the broadcasts are staged conversations between characters describing day-to-day events in an early forestry worker's life in Dryandra.