Save tons of money by building your own LED pen that works with a multitouch smart board / whiteboard. You'll also need a WiiMote (Wii Remote) to use in conjunction with your homemade LED pens that you'll be making in this video. To get started with this awesome project, you'll need a 1.5 volt tolerant infrared LED, momentary push button switch, AA-battery case holder, one AA battery, containment unit (Sharpie marker or highlighter body), pliers, superglue, thin copper wire and a soldering iron.