Stephen Fry explains ... How Christmas Tree Lights Work

Where you get to be a National Treasure™

Competition Following the example set by National Treasure™ and ubiquitous luvvie Stephen Fry, who excelled himself by explaining how GPS works, we invited you to submit similar Fry-esque explanations.

It's a tough challenge to be as patronising and idiotic as Fry, but we have three cracking contenders. Here's the first of these.