Watch this cool personally picked and extremely easy to understand Electricity Facts for children video:
Facts about Electricity
Ever wondered how a simple circuit allows a light bulb to light? It all happens because of electricity. A circuit is a route through which an electric current can flow. In our example, electrons flow from the negative side of a battery to a conducting material on the base of the bulb. The electrons flow up a wire that is inside the bulb and across the filament which is the part of the bulb that actually lights.
When the electrons go through the filament, some of the electrical energy is changed in heat and light energy. The electrons continue down another small wire inside the bulb to another conductor on the base of the bulb. The electrons finally make their way to the positive side of the battery. There would not be a complete circuit if the electrons did not travel to the positive side of the battery and the bulb would not light. The unbroken path that the electrons follow is called a closed circuit because electricity will only flow on an unbroken path. The light bulb would not light unless there is a closed circuit.
Now, look closely at the light bulb and you will notice that there is an insulator between the conductors that lead up to the filament and the conductor that leads away from the filament. Remember that the atoms of conductors easily accept and pass on electrons. The atoms of insulators do not. As we discussed earlier, electrons will not easily pass through the insulating material that surrounds the wire. If an insulator did not surround a wire carrying a current, it is possible for the electron flow to get directed to another conductor that comes into contact with the circuit. Electricity will follow the path of least resistance. If the electrons take a path short of the complete circuit, it is called a short circuit.