Physics teaching, as one of the fundamental STEM fields, has an increasing importance in modern education. In this diploma thesis we put emphasis on early learning of physics, especially the concepts of force. By introducing children to the concepts of natural sciences in lower elementary school teaching, we provide opportunities for inquiry and asking questions. Great deal of studies demonstrate that early introducing children to the STEM field is crucial to their further progress and guidance towards these areas. Physics teaching has a physical experiment as its focus, which allows more interesting approach to students, and the possibility for their independent research. Children at an early age are curious and ask questions, therefore, we should use this period to expose them to interesting concepts of force and encourage their collaboration and research. In this diploma thesis we show how physics can be introduced in lower elementary school already, through the concept of force. If children have not encountered them before, the same experiments would be good to perform within the framework of appropriate topics in the physics curriculum.