My wife and I are in our thirties we have lots growing in the yard. We teach our three young children what we can and about what we grow. I did not learn anything about gardening or growing food in school and was limited to what my mother knew, she worked part time. My father worked 60-70 plus hours and left limited time and energy for it. Later in life when he retired it showed he had a green thumb too. I can see where having 2 parents working full time jobs will limit what they can teach to small children. I've noticed the dependence on electronic devices, TV, video games more than when I was young and them having way more visual and audio stimulation being a major factor as well.