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Today at enrich we did our chemistry. We were making a light source made out of a pie tin, a pencil lead, alligator wire and a jar + 8 batteries. First we taped the batteries together to make a chain of batteries and connected them with alligator wires. We put the alligator wire onto the toilet roll and put the lead in the top of the wire. Then we touched each side with the wires.  It just exploded and made some smoke.  It was really interested.