On the tropical island of Rarotonga in the Cook Islands, a brightly painted hut at Punanga Nui Cultural Market overflows with colourful sarongs, handmade jewellery, carry bags and artwork. Visitors stop to browse the displays, but few realise the little shop exists thanks to the dedication of two volunteers who simply saw a need and decided to help. Today, it's one of the most cheerful spots on the island. But a few years ago, the shop sat closed and empty. The couple first a