In Chile, interest in swimming has been growing. Thus, it is observed how families are interested in having their children learn to swim, approaching the different clubs that offer these matroswimming or baby swimming courses. This is the origin of this research work, which has a qualitative, descriptive character, corresponding to a microethnography. The objective is to know which is the methodology used in the matroswimming classes and to identify which are the adequate swimming programs for children under 4 years old offered by these courses. In order to achieve the objectives, research was carried out by means of recent literature, a semi-structured interview was created and applied to teachers and families, ending with the observation in a swimming pool in downtown Santiago, where matroswimming classes are held. With the information gathered, several triangulations are carried out, allowing to describe the adequate characteristics for the matroswimming programs. It is concluded, according to experts and theory, which is the most adequate way to work.