iPod: A pocket-sized device used to play music files. It is designed and marketed by Apple.
iPad: A tablet computer designed and developed by Apple. It's shiny and pretty, used as a more portable version of a laptop and a more user-friendly version of a smartphone. It's also a fabulous little TV.
iPhone: Apple’s smartphone. It does everything a phone can do, plus most of what an iPad or a regular computer can do.
Internet: The internet is a global network of computers. It's everywhere, but you can't touch it. It enables people to send and receive data almost instantly over vast distances. Even from space (NASA's astronauts regularly tweet from the space station). Incidentally, someone with a lot of time on their hands worked out that the internet is about the same weight as a strawberry.
Icon: An icon is a small graphic image, picture or object that represents a file, program, webpage or command. They are easily recognisable and help you execute commands and open files, programs or documents quickly. In theory, anyway…