There's quite an important point being made here. CC recruitment methods have become something of a cliché; and something of a joke. We all appreciate the need for teamworking, but do those endless build-the-London-Eye (Sydney Harbour Bridge, Golden Gate etc etc) using soft-boiled eggs, nails and extinct kids' TV presenters really illuminate anything? Making adults sit on the floor and play with Lego is faintly insulting, isn't it? If they have worked as CC already, you know they can do the teamwork thing. If they haven't, there must be better ways than this of finding out.
I know of no other industry that insults potential employees like this. Isn't it time for a change? I reckon any airline that were to drop this kind of rubbish and start treating CC applicants as the intelligent grown-ups they presumably want on their books, would have the best calibre people beating their doors down.