I have a hall door that I want to have automatically close slowly, not fast. I've tried a proper door closer. It was cheap but became very noisy fast. The other issue with it is I have young children and the youngest had trouble pushing it open even though the strength was wound down.
Option 2: I found something I think would work. Butterfly spring door closers. These are put over the hinge pin. However, getting them to NZ is a ridiculously expensive process. A $3 spring wants US$30 - $60 shipping from Amazon or Ebay. I can't find them on Ali Express which usually has free shipping to NZ.
Any other improvising options? I was considering a weight, some strings and eyelets but that would look a little bit untidy.