Tinkle, India’s English first magazine for children, has just published its 600th issue. Rajani Thindiath, who took over as the magazine’s editor after the demise of Anant Pai, speaks to the New York Times‘  blog, India Ink: Q: First things first. Why is Tinkle called “Tinkle”? A: Subba Rao, who was the associate editor of…