A new Boston-based children’s magazine may be the ultimate in niche marketing, and it represents a fascinating crossover between the world of traditional publishing and the do-it-yourself ethos of the online world. “On several counts, Kahani is unusual. The founders knew nothing about magazine publishing when they started in 2004 but found their way with study, practice, and expert advice. They have no advertising; they’ve funded the project themselves, so far. Most unusual is the publication itself: the first children’s literary magazine for South Asian kids in the United States.”