A charming folk art tradition in India involves creating geometrical designs on the floor of living rooms, courtyards, or out in the streets. Called Rangoli, these creations are typically made during Indian festivals for decorative purposes and to bring good luck. And the materials to make them are sourced directly from nature. It may be hard to believe, but these extraordinary designs are comprised of a dazzling combination of naturally-colored rice, flour and sand, as well as flowers and other ephemeral materials