Gaming
Yes, believe it or not, if your kids spend every waking minute glued to their computer system playing video games then rather than having to drag them away and causing a screaming hissy-fit in front of the neighbours, it's now possible to bribe them into the car with the installation of an on-board computer system.
By use of a power inverter, 150w recommended, you can adapt your 12v cigar lighter socket to a 240v 3 pin mains socket by which to power your games machine.