So not teens or very young adults. Sounds like one might be the father of the stroller rider.
In that case, it sounds like what I call the "new breed" of young JW.
They put in token everything...
Meetings are on their phone while also surfing the net.
Assemblies they are there late on Friday if at all, mostly there on Saturday and Sunday for the meal with friends after.
If not for pressure of "in" parents and in laws they wouldnt even do that.
The females exhibit a little more effort in this age group. There is a cluster of pioneers in the 30 something age group. Many of them are using it as their "career" and it gets them honor inside the Hall.
Its similar to the nuns in the Catholic church.
The other pious young women in that category are the young moms who believe the Org teaching that your dependent children will die at Armageddon if you dont do all the things the Org currently proposes - such as field service.
This is a unique group the 20 and 30 year olds...
They take what they need and leave the rest.