Wikijunior:Big Book of Fun Science Experiments/Simple switch

To make a simple switch you will need:
 * a battery
 * a bulb in a bulb holder
 * a small block of wood
 * 2 brass pins
 * a paperclip
 * 3 wires with "alligator" clips.

Build Your Switch
‎
 * Measure your paperclip, then subtract 1/4 in from its length.


 * Shove the pins in the wood that far apart, making sure one of the pins goes through the paperclip.

Wire Up!

 * Run a wire from one terminal of the battery to one pin on the switch.


 * Run another wire from the other pin to the bulb.


 * Run the third wire from the other terminal of the bulb to the second terminal of the battery.

 Have Fun!