I highly recommend Processing and The Coding Train [0]. The visual feedback is both engaging and illuminating to folks who have no prior experience with procedures or spreadsheets.
Just to add to this great recommendation, https://p5js.org/ (JS port of Processing) is really great as they can get started right away and the docs are super simple. Dan uses it in most of his videos and really starts at a basic level, but works up to really complex concepts as well. My kids are younger, but they like the graphical part of it way more than me showing them the terminal and Ruby.