How do you make a simple switch?

To make a simple switch, you can use a conductive material, like metal, that completes a circuit when connected. Begin by connecting two wires to a power source and a light or device you want to control. Attach a lever or button mechanism that, when pressed or flipped, bridges the gap between the wires, allowing electricity to flow and turning on the device. When the lever is released or the button is pressed again, the circuit opens, turning off the device.