The Australian Changeables are quite different from those released in other parts of the world.
The Austrtalian versions were available for purchase with any burger or muffin and included:

Mega Mac, Robofries, Shakernetic and Burgertron.

Each 'food item' changes into a Robot.

Each packet included a Picture Insert with instructions and dated © 1991McDonald's Australia Ltd.

A Poster measuring 73cm high x 48.5cm wide was used in-store to advertise the promotion