Here's a game that keeps radio-lovin' 'tweens from squabbling over the car stereo.
To begin, the passenger riding shotgun hits the radio scan button. Then each passenger in turn gets to act as Radio Jockey, with the power to have the scanning stopped at any song he or she wants to hear.
The chosen station continues to play until the song is over, at which point the scan button is pushed again and the next player gets to choose. Any player, upon hearing a favorite song, can order the scanning stopped even out of turn, but he then forfeits his next turn. Along with the anticipation and surprises, half the fun of this activity is debating the merits of what passes for music among your traveling companions.