I first read this one before I was ten years old, read it to my Daughter (now 49), and to my son, (now 32), and will re read it when it returns from whoever I last lent it to. Ernest Seton & Dan Beard were active in the formation of the Boy Scouts of America, but Mr. Seton's ideas lost out to those of Mr. Beard, to the loss of a hundred years of American boys. Nevertheless, Mr. Beard's "American Boy's Handy Book" is another good read for those interested in what went on before the advent of television; not to mention computer games. Interest in this area has been recently aroused by the publication of "The Dangerous Book for Boys", rather tame stuff compared with "Two Little Savages", and absoutely innocuous compared to my own boyhood, Seton is much closer to the reality of those bygone days.
Looking back from my 80th year. "Two Little Savages" is an unappreciated American Classic, even though it's set in 19th century Canada.