Wire

Wires are resources used in redstone circuitry. Simply place wire onto a redstone torch to start a wire that runs from torch to torch, much like a tripwire. This way you can set circuits up without need for so many ugly, obvious blocks.

Pros:

 * Doesn't need blocks underneath
 * Harder to see from a distance

Cons:

 * Uses gold
 * Must be placed in straight lines