Okay kiddo, so have you ever seen a TV? It's a magical box that shows pictures and sounds when you turn it on. Now, some people use a special kind of TV that only lets them watch programs that are being broadcasted over the airwaves, like a radio. This TV is called a receive-only TV.
The way it works is that there are towers called TV broadcast stations that send out signals carrying pictures and sounds. The antennas on the roofs of houses and buildings pick up these signals and turn them into pictures and sounds that we can see and hear on our TVs.
The receive-only TV doesn't do anything fancy like record shows or play games, it just receives whatever is being broadcasted at the moment. It's like a special window that lets you peek into what's happening in the world of TV right now.
Some people still like using receive-only TVs because they don't need any special equipment or subscriptions to watch their favorite shows. They're like old-fashioned toys that still work great even though there are fancier toys out there.
That's it! Was that explanation easy to understand?