I snagged a couple of invisible ink pens from DealExtreme; at <$2 with free shipping, the price is great. Make sure you order ahead of time, however, since they’re shipped from Hong Kong. I just got mine in the mail and figured I’d share the results.
The invisible ink pen is a little shorter than a normal pen, and it feels like construction is pretty sturdy. The cap makes a satisfying snap when it comes on and off, which is nice since (hopefully) the tip won’t dry out very quickly. I also like how the pen had one of those tabs separating the battery and the connector for the black light– it would really suck to have a non-working light when you open the package since that’s pretty much essential to seeing what you wrote.
Next we have me writing with the pen… oooh, so exciting, I know…
