hmmm cool video. I didn't understand everything but now I want some bananas

#1 Let me explain by using the banana space bar example 00:08:

When Makey makey detects even very small electric current flows through its button terminals, it forwards a defined keystroke to the computer. Actually it is a very sensitive USB keyboard. The electric circuit is closed on this way: Alligator clip - hand - banana - alligator clip. There are just a few microamps (you don't notice that very small current at all) flowing that are enough to detect the "button press".

If you look closely, you will see that all example applications need ground wires at the "earth" patch for closing the electric circuit:

play-doh gamepad: wristband
pac man pencil joystick: wire held by left hand (probably), pencil lines are graphite, which is conductive
dance dance buckets: all buckets are wired, other thin wire is held in right hand
piano stairs: no idea from this perspective
banana piano: black wire held in left hand
human synth: wires held in hands
cat photo booth: wire in water bucket

Btw: Cat flooded the cat photo booth: 1:13

At first, this must be fake. but then I started wondering, this could be real

This here is that there thing fer sale...http://www.makeymakey.com/

Wow! Will it turn my old typewriter into a keyboard?

Can you attach it to your penis/nutsack, anyone knows?

I've got a Keyboard, thanks

please tell me more and take my money!
holy crap that is one cool invention