Very often web development tutorials focus on summarizing how a framework works, or how to put together a Hello World project very quickly.

I think an enjoyable exercise to do, regardless of the framework being taught, is to access the Site or API that is being developed (running in localhost) from the browser in another device connected to the same Wi-Fi network.

This probably deviates a bit from the topic, but it has a lot of interesting things to play with: identifying your local IP address (there are many different methods), learning a few new terminal commands, asking someone in the same network to experiment with the non-released version of the web app, etc.