A circuit is a unopened loop in which electrons can move from one place to another inside of the circuit. A really good source of electricity, such as a battery, gives enough electrical energy in the circuit. Unless the circuit has completed itself, that is, making a full circle back to the electrical source, no electrons will move. An electric circuit is like a pathway made of wires that electrons can flow through. A battery or other power source gives the force (voltage) that makes the electrons move. When the electrons get to a device like a light bulb, your computer, or a refrigerator, they give it the power to make it work.
What really does make electricity move everywhere? Electricity really wants to flow from a higher voltage to a lower voltage. This is exactly like a balloon, where the pressurized air in the balloon wants to flow all around from the inside of the balloon (higher pressure) to outside the balloon (lower pressure). If you create a perfect conductive path between a little or a lot higher voltage and a lower voltage, electricity will flow along that path that has been created. If you insert something useful into that path like an LED, the flowing electricity will do part of the work for you, like lighting up LED. An electric current is a flow of electric charge. In electric circuits a charge is usually carried by lots of moving electrons inside a wire.
What really does make electricity move everywhere? Electricity really wants to flow from a higher voltage to a lower voltage. This is exactly like a balloon, where the pressurized air in the balloon wants to flow all around from the inside of the balloon (higher pressure) to outside the balloon (lower pressure). If you create a perfect conductive path between a little or a lot higher voltage and a lower voltage, electricity will flow along that path that has been created. If you insert something useful into that path like an LED, the flowing electricity will do part of the work for you, like lighting up LED. An electric current is a flow of electric charge. In electric circuits a charge is usually carried by lots of moving electrons inside a wire.