The child will not be emotionally stable
The answer is:
Age
This is because if your young your organs are not as developed. When your older your body handles more because it is developed fully.
Volleyball, and Baseball because you need to have power. In volleyball you need power to spike the ball. You need power to hit the ball in baseball.
Harsh or vigorous movements can be detected as disrespectful or have rude intentions.In a calmly and non-abrasive manner simply easing simple things such as the number of pointing and hand to face interaction that is done can decrease your chances of being disrespectful with a client .