Soil was used to create a detailed message, and was definitely easier to control due to its fineness. It was also a material that was not as vulnerable to the wind as other materials were. We knew that only either rain or most likely human interaction could affect the word. Several visits later, the soil had absorbed water, with dirt seeping its way out onto the surrounding concrete. The next day, someone had wiped out the “o” and “b” in the word, now reading as “serve.” This was an interesting outcome, seeing how it engages people to interact.