We want to improve the corporal expression and the "motricity" through free games, simulated actions and costume races. In this case, we prepared an interval race in which the pupils had to dress themselves at the same time they have to run. At the end, they had to express a little action explainning their customes. The object of this task is to improve their "motricity"; it means: to improve the power of the body to relate others, produce and transmit information and create value and sense through physical actions.