[lwansbrough]

This idea is sort of being explored already: https://www.youtube.com/watch?v=itbwXMMkBQw

There's other ways of doing this too. Rolling a ball up a hill, inflating a balloon under water, etc.

[spurgu]

That looks like a real life battery level indicator.

[quickthrower2]

My take: it's cheating at jenga.