ELI5: Explain Like I'm 5

phone

A phone is a device that lets you talk to someone who isn't in the same place as you. It's like you're having a tiny party with just you and the person you're talking to! When you call someone, your voice travels through wires or through the air like a radio wave, and it reaches the person on the other end of the line. The person can then hear what you're saying and talk back to you.