So this happened this year on a field trip to the North of Spain, when we visited a natural cave system. One of my friends car broke down, and there we were, trying to get a look using movile phones. We couldnt see a thing, so I asked around for a pencil, and took my jump wires from my trunk.
I slit the pencil in half (SAK to the rescue!), took out the graphite and broke it down into smaller pieces. I the attached the wire to both ends of the pencil lead, and hooked it up to my friends car battery. Voala!!!!! Instant light. Light depends on the lenght of the lead.
Strangely enough, no girl came over and said I was brilliant. That, I'm afraid, only happens in movies
In my oppinion, Graham Bell has a lot to answer for. It gets harder and harder to escape from the world, the news and worst of all, people.