What are electric signals?

Electric signals are like messages that travel through wires, just like notes passing between friends in class.

Imagine you and your friend are playing a game where you send each other secret notes to tell what to do next. If you write "pass the ball" on a note and slide it under your friend’s desk, that’s how they know what to do. Electric signals work in a similar way, instead of paper notes, tiny electric charges move through wires like little messengers, telling devices what to do.

Think of a wire as a long hallway where these tiny messengers run back and forth. When something happens, like you press a button on a toy, it starts a chain reaction: the messengers race through the hallway, and when they reach their destination, the toy lights up or plays music.

These messages are used in everything from toasters to smartphones. Without them, your favorite games wouldn’t work, and you’d have to shout across the room instead of sending secret notes!