Dissolve a box of
baking soda into a
gallon of
water. Stick two pieces of thick solid
copper wire into the
solution, apply
DC current. After a long
time, the
solution will turn a really dark blue. Remove the now
black piece of
copper wire and replace it with
something made of
steel. Replace the
other piece of
wire (which has
probably disappeared) with
new copper wire.
Don't shock yourself, it hurts. Make sure to
spill the
solution everywhere.