Here’s an inventive way of using YouTube – once you’ve waited for the movie to load, you can click on different places in the timeline to play a corresponding piano key.

Of course, the first thing I did was a show-stopping performance of No Limits (which sounded amazing in case you’re interested), but I’m sure you can play other tunes too. So next time you fancy tinkling on the old ivories, pop down to YouTube.

In the never-ending arms race to produce ever more complex ways of interacting, I think we sometimes lose sight of the fact that people like simple, fun, frivolous stuff.

And here’s a great example of this from Sweden that made 66% more people take the stairs instead of the escalator. If we installed this in places across the UK, maybe we won’t all die of heart disease.