The thing that goes around a circuit is electricity, specifically electric current.

Here's a breakdown:

* Electricity is the flow of electrical charge.

* Electric current is the rate at which this charge flows. Think of it as a stream of electrons moving through a wire.

Here's how it works:

1. Power Source: A power source (like a battery) provides the energy to push the electrons through the circuit.

2. Circuit Path: The electrons flow through a closed loop called a circuit, following a path created by wires, components, and devices.

3. Components: Along the way, the electrons encounter various components, such as resistors, capacitors, and light bulbs. These components use or modify the electrical energy.

4. Back to the Source: The electrons eventually return to the power source, completing the circuit and allowing the flow to continue.

So, it's not just electricity, but the movement of electrical charge (current) that goes around a circuit.