The current is a measure of the flow of electrons around the circuit. Electric current is measured in Amperes or Amps. The higher the current, the greater the flow of electrons.
Current is measured with an Ammeter, which is placed in the circuit, i.e. in series:
Voltage is measured in Volts. It is a measure of the energy available, i.e. the higher the voltage, the more energy each electron is given. It is rather like the driving force that pushes electrons around the circuit.
Voltage is measured with a Voltmeter but this is not connected in series into the circuit. It is connected in parallel, across whatever you are measuring,
ContentsSafety, Static Electricity