omg isn't that dangerous what he's doing?!?!
J/k! Although I'm sure that is what your typical uninformed parent would say as their little Tommy is chained to the TV playing PS2 all day. Of course we know, sloppy technique is dangerous not the exercise itself. Kudos to you and your son for starting early and doing it right. Maybe some of the other kids in the neighborhood will take note and follow.
100,000 generations of humans have been hunters and gatherers; 500 generations have been agriculturalists; ten have lived in the industrial age; and only one has been exposed to the world of computers.