A little boy between the age of 7-8 sitting with an adult whom I assume was his mother. The little boy kept kicking the back of my seat. I had to ask him to please stop. It would be beneficial before take offs if the flight attendance would remind parents or adults traveling with children to control them. It is very annoying and rude for someone to keep kicking a person's seat. Not only is it annoying and rude, it can also cause damage to the seats. It is best to be proactive in situations like this.