smiddy: ...I could be wrong but I don`t ever remember children being baptised as happens today , and certainly not depicted in that art work.
I don't think you are wrong. In the 60s, it was not usual to see children baptized.
My parents had a rule that us kids couldn't get baptized until we were at least 16. (thank goodness...I left when I was 13/14)
Child baptism was not considered a "thing" in the post-war years. My mother had been part of the pre-war scoop that saw very young children get baptized in anticipation of the 'armageddon' that the war was going to usher in. She had been six years old when she got dunked by the "Society men" that had been sent out into rural Canada to save all those children. She said that the Society, after the war, offered all those children an opportunity to be re-baptized, if they felt they needed to be, as adults. My mom didn't bother...she said "Of course I agreed to be baptized at 6 years of age - I wanted to make my parents happy...I had no idea what it really meant."
Child baptism was a huge part of the pre-war years that saw events such as the "Children of the King" assemblies and the release of the book "Children" in 1941. The WTS needed the children to help fight the pledge of allegiance legal issue that they were facing.