I got into it at varying levels at different times. As a pretty young kid, I got into GameMaker, and got my first taste of programming logic. In middle school

I got into it at varying levels at different times. As a pretty young kid, I got into GameMaker, and got my first taste of programming logic. In middle school, one of my grandparents bought me a Raspberry Pi, which got me into Linux and Python, neither of which I had a strong need for at that point in time, but which have both made quite a large impact on my life trajectory by now. In highschool, I programmed my calculator (TI-83 ftw!) because I got tired of doing geometry homework. My honest recommendation is to find out his interest (games for me), available mentorship (RasPi), or need (math for me), and then show how programming can help. I should point out that I'm pretty young, probably closer to your son's age then your own. Maybe close to equidistant.