I created this "tornado lamp" using a blu-ray laser and some cheap and easy to find parts. This whole build can be completed for $15 and looks AWESOME!

This setup is essentially a violet laser "time tunnel" shining through fluorescent liquid.

5mW 405nm laser module for $6.10 free shipping: http://www.dealextreme.com/p/5mw-405nm-blue-violet-royal-purple-laser-module-3v-80918?item=6~r.93098389

Check out http://laserpointerforums.com to learn more about laser pointers, lasers, and laser pointer companies! I have been a member there for 8 years, and have received a bunch of help from the knowledgeable members there!