ZURICH, Switzerland (Reuters) – The colouring book has been a childhood favourite for many years and is often a first opportunity for creative expression. But Swiss-based researchers are using augmented reality (AR) to put a magical new spin to the traditional pastime. Children use pens or crayons to colour in a cartoon-like character, such as a princess or an octopus. When a tablet running their app is held over the finished picture the character bursts into […]