Innovative ideas...

[anna]

I had begun to think that innovation was a thing of the past but then little gems like this one pop up...

Gravity Light (http://www.indiegogo.com/projects/282006)

[garynortheast]

Brilliant, and even more so because of the simple principle involved,

[Sid Squid]

It's a great idea - but it isn't a new idea.

[tigersaw]

Many years ago there was a device where you hung a bucket of water/earth on a spool and it came down charging a battery to power a transistor radio. Used in Africa etc.
An 'inventor' reinvented this as the wind up radio and tried to sell it in a country where batteries and power are abundant.
He later went on the invent the shoe powered phone charger.
Reminds me of K-Tel in the 70's