The yellow arrow, the "Why are you here?" project.
In the library, a huge arrow made out of yellow construction paper, mounted on the book and pointing to a yellow box. The box contains two little booklets, one for girls and the other one for boys, with several questions asking things like... why are you here, name, age, favorite color... and if they would like to be contacted.

Again we were trying to be "loud," attract attention, interest, but this time trying to be a little bit more specific. With the arrow pointing to the box we hoped for people to walk up to the box and interact with it, be surprised... and this time we also left a little square open for the books code - so the books could still be identified as the titled was covered by the construction paper.