The maker movement is promising to reshape our relationship with the design and manufacture of computers and electronic devices by bringing a DIY approach into this field that has - so far - remained the exclusive domain of big industry. We meet Italian technology designer Massimo Banzi at the Maker Faire in Shenzen, in southeastern China. He is there to talk about his creation, the Arduino, the open-source computer control device that has fuelled a movement of 'makers'. Thousands of people are adopting Arduino to build everything from 3-D printers to drones, smart home devices to robotics.