With the growing number of AI-Tools in many domains, AI literacy is essential for their save, efficient and reflected use. Often, AI literacy has a focus on the usage of tools. In my talk, I will argue why a theoretical understanding of basic principles of AI methods is an important prerequisite for tool use as well as for critical reflections of effects of AI technologies on society and environment. The major challenge in communicating AI concepts to laypeople is to convey technically correct information that is at the same time didactically tailored to the target group. In the talk, I will introduce basic AI concepts together with illustrations how these concepts can be taught. Furthermore, I will point out typical pitfalls for misjudgments that are based on an inadmissible anthropomorphization of AI.