I started around 2 months after he was born. However, around 7 months, I took him for Easter Mass. It was a nightmare. I don't know if it was because it was crowded and we couldn't sit in our usual area, but he cried, or a better word, YELLED, from the time we arrived. Nothing soothed him, I finally left after 15mins of non-stop screaming. He goes with me now, since he has turned 1yo. He doesn't cry, but he actively participates--sings and claps with the choir. He also gives his own sermon after the priest finishes
My church members enjoy his little presentation.