Completely agree! The number of people I know who I think would struggle to know whether to hold the plastic or metal end of a screwdriver is depressing to me. I want my kids to grow up with a basic knowledge of mechanics, mechanisms, repairs/maintenance, and experience the world as things that can mostly be understood (and created) rather than things that are conceived and made by others and merely consumed by "normal people".
It also has saved a fair amount of money over the years, but the mindset is more important to show my family than the dollars.