Griffin Technology and Crayola have released Silly Face Swaps HD, a new app that allows children to build personalized colouring pages with their own photos. The app provides a variety of animated colouring pages featuring characters such as astronauts, rock stars and wizards designed to include a photo of a face inserted into the drawing. Children can then use a variety of digital Crayola colouring tools such as crayons, coloured pencils and markers…