Free Light bulb: Copper and Iron
Here is what you need
Copper wire, jar with suitable cork lid (the jar will be you light bulb, so choose accordingly), a 6 V battery, and a iron wire. The iron wire will act as the filament, so get iron wire which is not thick, those used to hang frames from wall are good,
Safety Note: This experiment is not suited for children without adult supervision. Remember, your safety is priority, and always work in a safe environment. This article is not responsible for the results of your own experiments. Keep in mind you will be creating a light. Never use high energy sources, NEVER USE 220 volts from your home for this experiment.
Step one: Make two holes on the cork lid of your jar.
Step two: Pass two copper wires through the holes of the lid. Copper wires should be insulated throughout the entire system, except for where they are connected.
Step three: Create a filament with the iron wires.
Step four: Connect each end of the filament to the each end of the copper wire. The result should resemble the inside of a home made lamp.
Step five: Stir the jar, as stirring the air inside of it, and put it on the system you assembled. Now the result should look like a finished home made lamp.
Step six: Connect the two cables to the 6 V battery. Connect positive end first, then negative. Before connecting the light bulb to the battery, make sure you are working a dry environment, water or moist will affect your experiment.
The wires should irradiate by the flow of electrons. The filaments will burn out eventually, you can then change them and start over. Be careful as the metal wires tends to overheat. Let the system cool or handle accordingly and repeat the process.