The flow of electricity around a circuit is often referred to as an electrical current. In scientific terms it is the flow of electrons. The size of an electric current is determined by the rate at which the electrons flow and is measured in amperes (usually called amps).
Electrical currents in circuits behave a little like water being pumped around a system of pipes. The electrons are moved around the circuit because a ‘push’ is given to them by an energy source such as a battery. The electrons cannot leave the circuit and are all moved at the same time with no bunching or spreading out and contrary to popular belief they actually flow from the negative end of battery to the positive. This occurs because the electrons have a negative charge and are attracted to the positive terminal of the battery, like unlike poles of two magnets.
