Interactive advertisements are fun and they definitely attract onlookers. The first one I've seen around Auckland this year was for KitKat, where you could take off parts of the wooden advertisement and assemble a chair - have a break [have a KitKat] and sit on it!
The second one is an advertisement for Spielberg's The Pacific miniseries. The one I've seen is behind the university bus stop, on Symonds Street. Here are some photos [click on them to see them better!]:
Hardly anyone passes the wall without pausing here. The letters are written by soldiers fighting in the war to their family. They're real, as far as I know ... I talked to the person putting them up on the wall, and he kindly offered me some. :) I also got some photos from the wall. Ooh, and there's a poem too, I wonder if I should post it here?