Current is how many electrons flow through the circuit. I believe 1 Ampere is 6,280,000,000,000,000 (6.28 quadrillion) electrons per second.
Voltage is the potential difference from 2 reference points in a circuit (usually the leads of a component or power supply). This is the force that pushes the electrons through a resistance. The more force, the more electrons. I can't go into any more detail from here, except for ohm's law.
Hope this helps!