Navam Perahera is the grandest outdoor parade on Colombo's events calendar, a full moon festival which treats spectators to thousands of performance artists in the streets and a parade of a hundred richly decorated elephants. Many of Sri Lanka's traditional art forms are showcased at the festival, including folk dance and music, and there are other visual displays from fire twirlers, stilt-walkers, jugglers and the like. Dancers and drummers from around the country join together to take part in a…