As well as the popular platypus mascot Expo Oz, designed by Disney's Imagineering Division, there were several themed initiatives that promoted World Expo 88, most notably the Expo's two interchangeable brands (as noted above): one an boomerang-styled '88' on a wire frame globe, and the colourful sunsails logo, which superimposed aspects of the Expo's entertainment on a relief of one of the Expo's popular sun sails (designed by Ken Cato, of Cato Purnell Partners). There was also a new weekly theme which allowed special-interest groups to entertain.