Which activity aids in developing volleying skills?

The activity that aids in developing volleying skills is bouncing a large balloon with one hand. This exercise is beneficial because it helps improve hand-eye coordination, which is crucial for volleying. By focusing on controlling the balloon's trajectory and ensuring it remains airborne, a learner enhances their ability to time their swings and adjust their positioning in relation to an incoming object, similar to how players position themselves during a volley in sports such as volleyball or tennis.

Using a tennis racket for practice can also develop volleying skills, but it typically involves more advanced techniques and might not be as accessible for beginners who are still developing basic coordination. Jumping on a trampoline does not specifically focus on volleying skills and is more suited for enhancing general agility and balance. Practicing martial arts, while beneficial for overall athleticism and body awareness, does not directly relate to volleying techniques. Thus, bouncing a large balloon is the most effective way to enhance these specific skills in a playful and engaging manner.