The serve in tennis is not yet as important for children as it is for adults. Nevertheless, it is important to introduce children to the serve as early as possible. If they have not yet mastered the serve from above, it is good if they can play the ball safely into the court underarm. The underarm serve should therefore be a high priority in your training. In this video, I show you some group drills for the Orange Stage that you can use to train the serve from the bottom in a fun way.