70 per cent of children start using tablets and smartphones at three years old or younger. SmartKit aims to teach children to use technology in a healthy way. SmartKit is a set of three children's toys that are designed by Matthieu Muller to be used in tandem with smartphones. Muller developed SmartKit to enrich a child's experience of technology and simultaneously help them develop a healthier relationship with it by combining the physical and the digital world. The toys, which include a car, plane and spaceship, are all made from cardboard and are animated using the features of the smartphone. This includes its speakers, display, and flash, all of which can be controlled by the children via an app on the smartphone in use. SmartKit was developed by Muller while studying the Royal College of Art's MA Design Products program, during which he answered a brief set by OPPO London Design Centre – the design hub of global technology company OPPO.