I grew up in the late 70s and early 80s. I first learned about programming from my father, who worked at DEC during its prime. To this day I deeply appreciate him sharing his love of the field with me from ayoung age. My first computer-related memories are learning to program in BASIC on a kit computer we had in our unfinished basement. I loved learning in a cold basement cellar surrounded by pieces of electronic gear in a makeshit office.
My second earliest memory about computers centers around learning Logo on an Apple II (I believe) in third grade. I remember exactly what Seymour describes: being shown the basics, and then being free to explore by making the turtle do what I wanted it to. I remember sketching designs in a notebook and then asking enough questions about angles and distances to be able to implement my designs.
I think my love of programming comes from an equal mix of people like my father who I could learn from directly, and people like Seymour who created systems that made it possible to learn independently.