Materials n Electrical tape n Eight D batteries n 0.7 mm Pencil Lead n Mason jar n Two wires with alligator clips n Toilet paper roll Instructions STEP 1: Use the electrical tape to secure all of ...

STEP 2: Use the electrical tape to secure the alligator clips to the sides of the toilet paper roll. STEP 3: Place a piece of pencil lead between the alligator clips at the top of the toilet paper ...