Model for the child's behaviour

Child-rearing practices are challenging. Understanding the child's psychology is not so easy task for parents. One among the most search area on google is child-rearing. Even a simple step or an effort helps the parents to obtain the great desired outcome. A classical example is written below.
I used to go to church with my family often. A small activity in his behaviour was bothering me. It was quite difficult for him to clap his hands during the songs session. Many times I told him and my wife too. But he didn't. I almost lost my hope for this corrective action.
It was a surprise that he started clapping on that particular day. I was happy and relieved. But I wanted to know the reason for his change. Because I couldn't correct him for months and now he has changed on his own. 
Every time during the singing session, I used to carry the songbook in my hands and sing. That particular day onwards there was a screen placed in front of us and we followed that. Hence, my hands were free to clap. when my son saw me was clapping he started doing the same. 
Here I learned a lesson. Before I try to correct any action in my son, I need to correct myslef!!!