I try not to prejudge anyone; you know, not judge a book by the cover. However, if you bring me one of these silly Nigerian books with silly titles like โAll Lagos Men Eat Fishโ or โOnly Big Nyash Matters in Heavenโ, I instantly judge you along with your Hints magazine.
First of all, this is a DIY way of making PCBs (Printed Circuit Boards) . The industrial way of making it is different and more complicated.
Second, I made this in my second year (Nigerian University). I marked my circuit with a permanent marker and sanded off the rest.
This is how circuit boards are made. I can bet that not one electrical and electronic engineering student in Nigeria both Uni and poly has this experience.