I have an interesting (to me) stamping/Jewish story to help keep this thread alive. My coworker is Jewish and her daughter will become a bat mitzvah in September. She asked me to make a scrapbook for her. I asked her if she wanted room in the book for folks to sign it and leave messages. I figured I'd leave some pages blank at the back. She said yes.
Then she told me that no one would be allowed to sign it on the day of the ceremony because it was a Saturday and "doing anything creative was considered work, and therefore forbidden." Even signing your name with a little note is considered work. I thought that was really interesting.