A long-range quantum communication network is among the most promising applications of emerging
quantum technologies. We discuss the potential of such a quantum internet for the secure
transmission of classical and quantum information, as well as theoretical and experimental
approaches and recent advances to realize them. We illustrate the involved concepts such as error
correction, teleportation or quantum repeaters and consider an approach to this topic based on
catchy visualizations as a context-based, modern treatment of quantum theory at high school.