DIY IR Pen - Pics

I uploaded a new Flickr Set of pics of an IR Pen I put together for use with my table. I actually made two pens, but I only have construction pics of the second one. The basic technique is to use a clicker style pen and use the clicker portion to push a small momentary switch that turns on an infrared LED placed inside the clicker. The switch is a small one that radio shack sells. For power, I used a AAAA battery in one pen and a watch battery in the other.