Related: check this post.
https://news.ycombinator.com/item?id=13264041
It's about the IBM PC Jr., which I had, and on which I wrote a lot of hobbyist code.
Mostly in the built-in BASIC, but some in Logo too (which I did not mention in the post). Logo came with the Jr. It was fun to program in.
The post also links to Mike Brutman's PC Jr. page, a retrocomputing site.
I has emailed with him about our common interest in the Jr.