Step 10: On/Off Switch
Solder wires to paperclips
Solder 1 magnet to 1 of the paperclips
Staple paperclips to wood.
Add magnets to paperclip with soldered magnet until they "catch" the other paperclip when turned on.
This will be the connection between pin 13 on the Arduino and the LEDs, when this is off the LEDs will not light up.