I recently wrote about why Skateboarding Kolkata is all sorts of awesome {read about it here}. They also focus on a community-led effort to help kids from disadvantaged backgrounds feel empowered and express themselves through sport.
They are constantly looking for volunteers. The work takes up about two hours of a couple of Sundays every month. To learn more about how this underground sport is changing lives and taking form in this city, do contact them and fill up their volunteer form. And check out their Facebook page here.