For some reason we ended up with a lot of 1 cent stamps. 60 sheets, actually. I didn't know this before, but the Post Office doesn't exchange unused stamps for stamps of a different value. So I asked the Post Master if I could send a letter using all 1 cent stamps, and he said, "I guess so." In the little rectangular space left over I wrote my mom's address. She said it arrived with each stamp hand stamped. Now that the postage rates went up again, I needed to get creative when sending my Dad's letter.