We leave in an age where it's expensive to keep children (and sometimes) yourself entertained on long journeys. However, don't despair for within this very blog post is a secret that will make any long trip an absolute joy - unless you're the driver, in which case you're screwed. Sorry. Just listen to some music or something.
And the beauty of this exciting travel game? It's absolutely free and its limited only by the vast landscape of your imagination. All you need is daylight (or low light at the very least), a working eye/spine/neck combination and a car window - and let the fun begin!
The rules are simple - position your head so you're looking through the side car window and can focus on a smudge, dot or scratch on the window itself. If the car window is too clean, I'm sure the owner won't mind if you get a permanent marker and draw a small arrow on it heading in the direction of travel. If the owner of the car does object simply wait until he's not looking and draw it then. If they spot you vandalising their car with a marker, adopt a disgruntled tone and point out that they should have been paying attention to the road and you're lucky you're all not dead - and then run away at the nearest opportunity and find a new friend with a car.
As the vehicle you're safely within begins gathering speed, imagine that said speck is a flying vehicle hurtling parallel to your car. You might think that this game isn't so exciting yet, but the real miracle is yet to happen. If you move your head ever-so slightly you'll note that can change the altitude of the flying smudge. When you've quite recovered from the excitement of that, the fun can begin. Using your skill and judgement "fly" the smudge on the window as low to the ground as possible whilst avoiding all oncoming obstacles.
Here comes the science bit.. Click on any of the pictures for more detail.