One question has not been asked, "what are we competing against" and commerce is the answer as most youngsters are already indictrinated into buying the latest "in vogue" item abd they would rather go to a fast food outlet for instant (plastic) food and then sit in their cars showing off to others. Commerce leads the way by producing something "en masse" very cheaply to maintain high profits, they do a huge production run and try to create the next fad or trend for profit and when it is sold out they move onto the next trend.
Modelling is the polar opposite in that it takes time and varying levels of skill to produce them, no instant gratification and no buying something ready to go for basically peanuts, and it takes many man hours to get something correct and can give many hours of pleasure; current medical advice is also that it is a relaxing hobby and good for you.
Apathy is also a great problem as many youngsters want something (bling) to show off with, they may have the latest phone, sound system in their cars, or currently on trend computer, but do they know how they work? no, they don't care how it works, merely that they have it; when it breaks they will pay for it to be repaired, if it is scrap they will pay to have it replaced, instant apathy.
Ignite a youngsters imagination and they become interested, show them how something works and they will try it, and show them that they can actually achieve something and they will often try it.