Developing ideas

As I was walking down Aro St. I saw a little blackboard placed outside someones house which said "how do you feel today", chalk was provided and people had written down responces such as : good, not happy, bored ... I thought this was very interactive so starting thinking up ideas based on this. I thought maybe it would be better to enlarge this idea and bring it up to a larger scale and putting more meaningful questions at the top e.g. My dream is...... , I love....., Before I die..... ect. This would be painted on a wall and people as they walk past would contribute their thoughts with the provided chalk. Although this was a cool idea, I was guided away from this because it was not very good for your senses, it was more an interractive installation.