Sticky note prayer wall - love this idea! || Would be great as a random act of spirituality. (ie. Say a school/students need prayer (first day of school, tragedy, graduation, etc) spread the word, set a place, drop off some pins and post-its, post a short 'intro' poster, see where it goes.) Could also be done for Lent in public, a temporary setting in a sanctuary, youth retreat prayers, etc.