" For every action, there is an equal and opposite reaction." And that's called interaction. For ages human beings have been interacting with diferent types of things. In this particular case the interaction is associated with the environment, as in what surrounds us, and with real-time, as in things happening first hand. Experimenting explains the concept of interaction because you see things happen live, this means that you can see things react to your instructions. To know more about these concepts, scan the QR Code or click on it.