I remember JWs taking their little ones out in field service, and 9 times out of 10 they didn't want to be there. There was one little boy that I still remember to this day. He was something else, the poor kid had some kind of attention deficit disorder. What made matters worse was his mother was a regular auxiliary pioneer, at the time it was a requirement for her to put in 30 hours a month. This kid was all over the place, and very loud. One day I decided to try something with him, and that was I brought with me an art pad and colored pencils, and that done the trick. It was enough to keep him occupied.
Then a few years later after my sister had her baby out in FS as well, she's still a die-hard JW today. The problem was it was the hottest part of the summer, and she had her infant out in the extreme heat.
Even though I didn't leave the JWs until my eldest was around 5 years, I remember only taking him out a couple of times, and the weather was fairly mild. When they were little I was not what you would call regular in my attendance, and going out in the field ministry was not high on my priority list.