How to make screws power an LED light.
Step 1:
First I drilled holes to ensure that all 3 of the screws would meet in the middle of the piece of wood. I made sure that the 2 screws located on the side were not touching in the middle to ensure that the top screw would be vital to complete the circuit. I also drilled a hole for a small LED at the bottom of the wooden block for the screws to turn on and off.
Step 2: Next I installed the screws into the Pre-drilled holes. Luckily they all met in the middle as planned. I also double checked to make sure they were conductive after installing them using a multimeter. I also prepared an LED light by soldering wire (Blue and White) onto the positive and negative terminals of the light.
Step 3: Once I knew the switch would properly conduct electricity I began to build the circuit. I started by attaching a resistor to the end of the blue wire to limit the current the light would get to ensure it would not burn out. I then wrapped the blue wire with the resistor around the left screw. In order to make sure the connection was strong I dripped solder onto the wire and the screw. 
Step 4: Then I connected the battery to the other screw to complete the circuit giving it power. I did this by connecting another wire (Red) to the right screw and attaching that to a 9V battery. The circuit was completed by attaching the white wire, that was soldered to the LED, to the positive terminal of the battery.
Step 5: Finally I tested the switch by turning the top screw until it made connection with the horizontal screws. The light powered on and off after turning the screw a quarter turn. Since I had decided that the wires were going to hang off of the screws on the exterior of the wood I wanted to keep that aesthetic consistent for the switch. I left all of the necessary components for the circuit exposed on the exterior of the piece to complete the raw and unfinished look.
Hey Dane! I really like your light up block you got here. I know how we talked about the wires being exposed as an interesting part of the piece and it is. I wood feel, though, that if you were to have this on display it would be interesting to hide the wires and allow the people to have more though on the actual piece and a little less on how it works.
Over all I'd say… NEAT!