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…
Instagram: Instagram is described as "A simple, fun & creative way to capture, edit & share photos, videos & messages with friends & family". Instagram is largely used on mobile devices - and while a desktop version is available, you can not upload images from a PC. Users can follow others and 'like' and comment on content. It is also possible to connect an Instagram account to other social media accounts so that images/videos can be shares simultaneously.
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.
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.
iPod: A pocket-sized device used to play music files. It is designed and marketed by Apple.