Every child in my family, back through my father's line for generations, has had their feet dipped in the waters of a particular spring. I believe that this was a tradition begun by my Osage great-great-grandmother. This tradition has been carried forward, even to my grandson and daughter-in-law.
It's a very serious tradition. The child has to be bare-footed, and must stand in the spring if they are old enough to stand, even though the rocks are sharp beneath their feet and the water is very cold. My parents made me promise to carry on the tradition with my children, which I did. And, I made my children promise, as well.
Because the spring, like most natural springs these days, is a fragile site, I won't say where it is. I don't know if my brothers have kept this tradition, though I hope they have. Our family has roots in that area of the country in addition to the spring.