The hard part is powering it, when the infrastructure to generate clean electricity is gone. What will you plug your transformer into? So solve that, create robust sources for electric power, and the rest can be solved with a few bulk laptop purchases off ebay.
If you have more than one survivor, you quickly need to learn to trade and cooperate to maximize your energy return, or else you all die, one by one.
Speaking from a North American perspective, kids are educated in how to succeed in a national/global economy, not how to build small communities and develop/share useful skills. TBH, the latter feels "obsolete" nowadays. Maybe that's a problem.
Plug it into the 'universal transformer' I was talking about, and you're in business. Known power output (that won't fry your precious electronics) and you don't have to care much what the input is.