I invented a new game for use on my weekly walk to the pub. I think it's suitable for most urban environments. Who knows it might even keep the kids amused on a motorway journey.
Here is how it goes:
Set off on your walk to the pub or the shops and keep a sharp lookout. You may continue your journey as long as you are in sight of a BMW or an Audi parked outside a house or driving by on the road. If you can no longer see either car in front or behind you then you may take another hundred paces in the hope that another BMW or Audi turns up. After that I guess you have to stop.
But you needn't worry.
It turns out there are so many that you will reach your destination without a problem.
Don't try this with Ford, Nissan or Subaru for example. These are rare cars unlike Audi and BMW...