The occasional artistic "doodles" that replace the Google logo are seen by hundreds of millions of people. But who are the brains behind them? A playable Les Paul guitar, a Pac-Man game and a keyboard ...

We've all been there. You’re sitting in class or a meeting and before you know it, your mind takes off and you've put pen to paper to make a doodle. But what you might not realise is that doodling is ...