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A lot of normal, basic calculators these days tend to be solar powered. But some of us don't get to see light much when we're trapped in a dungeon four stories below the surface without a computer. So when I heard about a calculator that could be powered by just shaking it, I became absolutely ecstatic. Now I can give it a few shakes and I'm ready to do my calculations. I quietly looked around and pulled out a 10 pound note from my sock and slipped it to the guard. "That Shake-u-lator Calculator costs 9.99. Get me one....please." I cried. He nodded in agreement and walked away. I knew the rest of my jail term would be easier now that I had a calculator I could shake to power up, turn upside down and spell "boobies" with.

Shaker Calculator [The Gadget Blog]