Buying the materials was easy and cheap.
Glue Gun and Paste
Assembly was not planned so I can't make a step-by-step procedure. And the aerodynamics was not done by an expert (because I'm not an expert at it). I just placed one fan for air intake and another fan to blow air out from the box directed underneath the laptop. And another fan to assist the laptop's exhaust vent.
I also replaced the power source from USB power to a power adapter from a broken laptop. Although the fans need 12 volts, the adapter's output is 19 volts. The brand of each fan is the same because when I tried using different brands, they just burned. How they managed that extra power is something I don't know, but they make a great addition because the fans are more powerful.