Wasn't really a fan of this one. The push() function name is misleading, as push() functions normally append to the end of a list, not prepend. Also the instructions for the buildOneTwoThree() function were lacking, figuring out what was being asked/how to impliment felt like a riddle (the answer for me was in the example usage of the push() function ). However, it did feel pretty satisfying once I got it, but I'm sure this a confusing and difficult kata for programmers new to linked lists