It is very important for the development of natural science competences of children to choose the right approach to teaching the physics. E-learning materials developed so far are a useful addition to the learning process. Their function is to assist in explaining the real world around us. Among other goals, this means the explanation of experiments and preparation to conduct them. In the frame of our national project we have prepared the e-learning materials which cover the basics of physics for primary school pupils. Children are encouraged to study the materials and conduct their own experiments. Teachers who have used our materials are giving us very encouraging responses and would like to use other learning materials prepared in this way.