Windweaver, finally watched the video.
What is that hideous octopus, monster figurine thing, it scared the heck out of me - yet your cat seems to be very used to it.
The bird on the 20 toea is a cassowary, a large aggressive emu like bird found in New Guinea and northern parts of Australia. They are known for their temper and have been known to kill people with their beaks and feet. They also run very fast. Just one of the many cuddly and lovable animals Australasia has (Except New Zealand, which is full of lovable and sweet creatures) that will basically kill you if it gets a chance.
The bird on the 10 Kina is the Bird of paradise, one of the most beautiful around and known for its brightly coloured feathers and there are several species.
We generally never use Quarter dollars in the British world outside of Canada, the 20 cent coins come from the old Florins and the Halfcrowns which were our quarters were not issued in decimal dayze as they were too close in value to the 20c.
PNG only used the 1 - 20 toea and 1 Kina as coins and the 2,5, 10 Kina were notes initially, a 50 Toea was issued as one off in 1980 and again in 1991. Now they have 5 toea to 1 Kina in coins and 2 - 100 Kina in notes. I still don't think the 50 toea appears more than spasmodically, 1 kina coins are the same but slightly smaller (30 vs 33mm) and there was a single 2 Kina bimetallic coin issued in 2008.