and don't introduce your kids to earning monry.
Truly said, childhood is to enjoy. So as quoted no need to make them earning from what they play. Better is to give them good time to play than always forcing them to study.
This is simply hurting your child. No internet? Old games? No digital games? Where are you from? 1970? Imagine how desperate and anxious your child will be hearing his friends talking about stuffs on the internet, new games, and other techy stuffs. He'll feel like you are somehow punishing him. Forcing a kid to go back to the 70's, that's bad parenting unless your kid doesn't have anyone to talk to or you're really really far from civilization.
Yes, there will be some good stuffs if you make your kid have a childhood the same as ours but imagine what he'd feel if he talk to other kids and won't be able to relate to any stuffs they are saying.