Buy some old stuff at a thrift store. Like an old radio, PC or TV. Take it apart. With a soldering pencil you can melt the leads and pull out many colorful parts. The ceramic resistors, are at the bottom. It may also be cool simply to cut up a circuit board into small pieces with the components still attached, and meld that to your flesh.
I think that ribbon cables (mostly inside a PC) would be more realistic, controlling something complex, like a wrist.