Excellent point. Computers are indeed like bubbles of custom universes that don't follow the rules of this one. The web doesn't have a real-world metaphor.

How do those universes and their foundational laws get created? By programming, of course. We all know that the stuff computers do is just built up from simple stuff that's been meticulously assembled into layers of increasing complexity: electrons on tiny wires, ands and registers, ifs and structs, packets and sockets, requests and threads, etc. But that knowledge is not discoverable by using a computer today.

It's no wonder that children don't know how to deal with failures that occur in the real-world interface of these custom bubble universes, when all they're thought about that interface amounts to magic gestures that trigger actions within the bubble. When a magic wand stops working, how do you fix it?