The volunteers restoring the beautiful beaches of Bali and beyond by clearing plastic pollution from Indonesia's rivers, and upcycling it into chairs. The profits are used to fund more river clean ups. The deaf toddler who has near normal hearing after groundbreaking gene therapy. Why are hundreds of sea lions gathering at Pier 39 in San Francisco? After seagull boy, we bring you lion girl - the five year old whose amazing lion roar has been viewed millions of times. We chat to two old friends who reconnected -- and then studied why old friends find it hard to reconnect. And we meet the football fan who moved to a new country to support his team in the English Premier League.Our weekly collection of the happiest stories in the world.