Is electricity made in a battery when chemicals inside react?
Batteries contain a fluid (electrolyte), one end of the battery is charged full with electrons and the other end is not, the electrons naturally want to re-arrange themselves but the electrolyte is stopping them from passing directly to the other end of the battery. Once you attach a wired from one end to the other the electrons will take the opportunity to shoot through it to get to the other end of the battery. If you let that happen though the battery will burn out so you need to stop the electrons from getting to the other end by attaching something like a bulb to the circuit.
