What is the Internet? Roadways.
I gave a class recently at a local library for non-Internet users. Who is that? Retired folks, mostly.
I compared the Internet to the highway system. Both are "public," already built. Then, you build a house which is like buying a computer. To connect the house to the highway you have to build a driveway. to connect the computer to the Internet you have to buy a modem. To use the highway you need a car, equivalent to a browser.
To use the highway, you don't need to know how to build a road or a house, you just need to know how to drive a car. So, we demonstrated how to use a browser, and everyone got a turn.
Your house has an address, your computer has a Web address. Your neighbors have Web addresses, too. All the businesses, schools, libraries, government agencies have Web addresses, just like they have street addresses. If you know the Web address, you can go see their Website. If you don't, you can ask for directions from Google or another search engine.
A security program protects the computer like an alarm protects your house.
They liked it, it made sense to them.