They've had to learn about life and death early on, respect for the natural world, work ethic, and consequences for skipping responsibility.
They've seen the byproduct of hard work and tasted food fresh from our soil.
They've had to care for animals and either watch them be sold for someone else to enjoy or helped butcher and eat the animal themselves.
They have immense freedom and roam the pasture and woods often. Many mornings they'll wake up before us and just go hang out with the goats and other livestock. They know how to use a staff twice their height and get animals from the pasture to the barn.
They're 7 and 9.
There's also studies which show possible immune system boosts and reduction of risk for asthma by being in and around barns and livestock, etc. (And they were breastfed till just after 1yr).
This didn't happen by chance, however. My wife and I lived in the suburbs and consciously decided to move out here and have this environment for our kids to grow up in and it's taken a great deal of effort and sacrifice to get here. So I very much agree with earlier sentiments that the attitudes and behaviors are a result of the parents.
They still have tablets and electronics, sure, but their use of such things pales in comparison to everything else which fills their days.