The tutorial I worked on was Codecombat - JavaScript / Python, primarily the JavaScript version. I did not complete the whole entire quest, and only got up to level 15, A Mayhem of Munchkins, in 1 hour as I was not able to figure out level 15. This tutorial was very, very, very interesting as it makes you think a lot and is very epic, as well as addictive. I think that I learned a lot from this and based off that it could be possible that people of greater age or ability could learn a lot as well. A tool that I have used that is similar to this is one in my personal life, Khan Academy. I would recommend this to anyone as the theme is acceptable for most ages (possibly violent for babies), and anyone can learn a lot from this not so complex quest for coding.