Step 1: Getting some stuff together...
-a switch (toggle, SPST type)
-some wire (about 22g, roughly a foot or two, coated!)
-sheet of plexiglass or acrylic (a like the 1/4" stuff)
-2 comp. fans (standard 80mm or 120mm)
-some nuts and bolts (#8-32 x 1 1/4")
-old power supply (for this project I used an 24VDC from an old epson receipt printer)
-some tools (Dremel (of course!), hobby knife, Drill, solder gun, solder (the good electronic component stuff) heat shrink tubing, heat gun or blow torch)