There have been many collections of songs and other sort of Pennsylvania Dutch Folkloric materials--Somewhere around here I have an old book that I believe is still available--a number children's of songs you probably know come from this tradition, including things like Dr. Ironbeard--I have heard a few fiddlers who play a traditional music

There are very many "simple" sects besides Amish and Mennonites, each with their own ideas, tradtions and dress-different right down to the potato salad, all with an orientation toward keeping their tradtional way of life alive, but not all quite as isolated as the popular ideas about them

-Down the road from us, in Franconia Twp in Montgomery County PA, there were two Mennonite Churches next to one another---one looked like something from the Little House on the Prarie, the other looked like a cooporate office center--

The LHP church had a parking lot full of Black Vans on Sundays, girls in aprons and bonnets, boys with brighly colored shirts and hats--

The other looked like anywhere else, except that the cars were always clean, and parked really well--

My daughter went to nursery school in a Mennonite Church, and once a week, the older women got together for a quilting session--

Another thing worth note--Many Mennonites use homeopathic and alternative medical treatments, and are have a commitment to political and social action that is similar to Quakers--

Curiously enough, along with the the other rather left-like tastes, many of my Mennonite acquaintances were very serious folk/tradtional music enthusiasts--