So, Cisco DevNet is like a special kind of computer language that some people know how to speak.
Now imagine you're a kid who likes to build things with Legos. You can build anything you want with Legos, right? Well, Cisco DevNet is like a bunch of special instructions that allow you to build things with computers and the internet.
For example, let's say you want to build an app that tells you the weather. You could use Cisco DevNet to tell your computer how to get the weather information from the internet and then display it in your app.
People who know how to use Cisco DevNet are called developers, and they are like the master builders of the computer world. They can use their knowledge of Cisco DevNet to build all kinds of cool things like apps, websites, and even entire computer systems.
In short, Cisco DevNet is like a magic toolset that allows developers to build things with computers and the internet just like you would build things with Legos. Cool, huh?