Researchers at Disney have created a tablet app that allows children to colour in characters that pop out of their books in real-time.

The software is based on  Unity games engine . This app will work for both iOS and Android devices.
“The Swiss-based team told the BBC that it hopes to extend the technology to other areas to help unleash youngsters’ creative powers.” 

 The Software PDF Link :  here 

A short video to understand the concept  :