I came across this course on the Raspberry Pi Certified Educators Course this October. It piqued my interest as it uses a text based adventure game to introduce OOP concepts to learners.
I had previously done this with an idea of a Space Invaders game using Visual Basic.NET. This was a fun introduction to concepts and it is easy to create classes and objects in VB. However my current cohort of learners are mostly unfamiliar with VB and have a better grasp of Python.
The course is written by Laura Sach, who I finally met at PiCademy after years of following her on Twitter. And I thouroughly recommend it as an accessible way of understanding Object Oriented Principles in Python