Amish in general do not usually smoke tobacco (they are more on the teetotal side of things). So those kids were probably being a bit rebellious, which is usual

Amish in general do not usually smoke tobacco (they are more on the teetotal side of things). So those kids were probably being a bit rebellious, which is usual for their age. Some church districts are okay with it though (both for smoking and/or agriculture), so it's possible they came from such a district too. Most in such districts smoke cigarettes. So, it's not that the Amish smoke pipes just to be old-timey.