I didn't read the source for this one, so the story is 100% new for me. It seems fun.
...okay, got to admit that, when I see people "reinventing" stuff from Earth, it makes me wonder why the locals never thought about it. If you have machines that can output wind/water/fire/earth, in controlled amounts, a hair drier is kind of obvious, isn't it? (At least it wasn't mayo or soy sauce.)