I want one!
I want a calculator arm!
Okay, in a recent science test one of the questions revolved around some scientists who stuck an electrode into a giant squid nerve, or something. They realised that it sent signals using positive or negative charges.
I thought "Aha! Biological and mechanical communication!".
All you'd have to do is stick an eletrode into one of my nerves (or something), then wire the electrode into a circuit board/logic gate that connects to a buzzer.
Then, I could flex my arm and have it go "Bzzzt!".
Then, I'd get it wired in to a simple calculator that understood input from combinations of positive and negative charges. Then, I'd get used to the language with my brain, and I'd have A CALCULATOR ARM!!!
I WANT ONE!