A group of teenagers setting off from Dún Laoghaire for a week of sail training on board the Spirit of Oysterhaven. Pictured  are Ciara Beatley; Kim Murphy; Alex Quinn; Dikhsha Ramsurn; Joan Osayande; Christina Byrne; Tina Thom; Balikis Falade and Guarav Ramsurn. Photograph: Nick Bradshaw

Like most young people, Samantha Ncube is obsessed with her mobile phone. She tweets, uses WhatsApp and texts throughout the day, and before this sum(...)