stokeace, when you are a big boy, you might be lucky enough to learn how to drive and, perhaps, even own a car.
Now imagine that you were pulled over by the police and held for seven days on suspicion that you had sent letter bombs to various addresses.
You are then released without charge, since, in that time they have found no evidence that you are linked to the letter-bomb plot, other than the fact you are a motorist.
How would you feel then?
Perhaps you could make this a "story-time" project with your school teacher. Remember, always use round-edged scissors and ask a grown-up for help with the difficult bits.