PLEASE HELP!!!!!!!!! ANYONE?

am going on a 12 hour car ride soon and am in desperate need of something to do. The things l have with me are an ipod touch, a DS ( without car charger) a portable DVD player and my mum, dad and two sisters. What can l do to pass the time. Apart from sleeping please help. Make your answers as long as possible! GET CREATIVE. BTW my sisters take up 2 of the 3 seats in the car so i dont have that much room.