Hello guys ! I'm organizing a scavenger hunt for my wedding and I want to hide a message in the musical sheet on the piano that I have at the wedding place. The musical sheet are written already but I want to hide a message in it with invisible ink. Do you have any inspiration or ideas on what to do ? Thanks in advance ! (the answer should be a 4 digits number (to unlock a chest)) submitted by /u/2uentinn [link] [comments]