The document describes a physical education activity where children run in the gym while singing songs. One child is selected as the "teacher" who shouts commands like "fire", "water", or "wind" that correspond to different actions for the other children to quickly perform, such as lying on the floor, climbing a fireman's pole, or crawling under a bench. The last child to complete the action becomes the new teacher. The activity aims to have the children practice doing movements while running, giving and following instructions, and reacting quickly.