Due to the importance of phenomenological aspects as a motivation for elaborating formal models in physics teaching, experimentation becomes a valuable didactical resource in this process. Providing the teacher with abilities for construction and use of simple and cheap elements, for presentation of experiments in the classroom, it is very important. This allows the teacher to promote among his students the interest for physics through the observation of phenomena and to motivate them to find out explanations discussing observations.
Keywords: experimentation, didactic, learn.