When I was a teenager, I could not use the family car on Sunday if I did not go to Sunday school and church. The car was both reward and punishment. All of my friends learned early the same lessons of cooperation with religion. My parents were never harsh about religion. They simply passed on to me the community customs and expectations that they had been given.
Religion is mixed in with everything else for children.
Cleanliness, family loyalty, teeth brushing, telling the truth, learning to share, respecting others, learning basic skills, studying, preparing for a vocation and many other values in life are taught along with a mixture of religions teachings, traditions, assumptions and speculations. It's also hard being an adult. It's hard being your real self and feeling good about yourself. When you are given the same punishment for not cleaning up your room, not doing your homework or not sharing your toys as for not praying, not going to church or not reading your Bible, the distinction between reality and religion can be blurred for life. Growing up means becoming independent and making your own decisions.