i had heard a few years back about the ability of hooking up toy EEGs so you can interface them with your computer.
I was reminded of this for a project i wanted to do for a class (instructable coming soon ;-)), and i also found a "Star Wars force trainer" on amazon for 30 bucks.
Here is the simple step by step instructions on how to turn a force trainer into a working EEG you can see with your computer.
special thanks to frontier nerds
for the initial code and the hack of a similar toy.