It’s not just 2 year olds either! I taught 8 - 10 year olds Catechism classes, and I could sure tell which ones were regularly taken to Church with their parents and which ones seldom saw a Mass with adult supervision. With the Priest’s encouragement, I took the 8 year old class, (some were 7, some already 8) who were preparing for First Communion into the Church at a time when it was empty, and began teaching them (by seeing, instead of in their books) where things were and their names: Altar, Ambo, Credence table, Tablernacle, etc… I had two 8 year olds (one boy, one girl) disappear on me while I was talking to the class in front of the Ambo. Went looking for them, found them beneath a long altar cloth, UNDER the Altar, playing hide and seek! They ran around the pews, giggling and yelling. I had to cancel the trip inside the Church and return them down the halls to the classroom, and gave the whole class quite a lecture on being quiet and respectful in the Church itself.
They did all make their First Holy Communion that spring, but that boy and girl, after receiving the Holy Eucharist, broke out of the line of children all dressed in whites, and started running down the aisle toward their parents, who sat in the back pew. Parents were quite embarrassed. They were yelling and carrying on. Evidently the parents seldom came to Mass or brought their children. When I had the same two kids two years later, they were well-behaved, knew to genuflect when we visited the Chapel, and wanted the whole class to recite the Rosary together. Apparently their behavior had quite an impact on the parents, who began bringing them every Sunday, and enforced some behavior rules on them. Should have started when they were 4 or 5. Had a good ending, but not all kids are controllable at such a young age as two, and are easily bored in a large room where they don’t understand what’s going on.
Usually by age 3 or 4, they are more willing to accept direction and sit quietly with the parents. They don’t call it the “terrible two’s” for no reason!! LOL Just don’t wait until the year they prepare for First Holy Communion to teach them reverence for Mass! That was the most stressful class I ever had – 8 well-behaved and two total terrors, even in the classroom. Good result was: the parents were so embarrassed they started bringing the kids to Mass every week and enforced good behavior. Bad result: I was a nervous wreck until the First Communion was over. Worth it, but what a year!