It was only a few decades ago when the only way to send someone a message was with a letter. For years, high school teacher Bruce Farrer has been giving his students the same assignment. He had them write their future selves a letter that he said he would deliver 20 years later. Most kids completely forgot about the assignment as life quickly went on.

But as WestJet explains, Bruce never lost a letter and always made sure to that each student’s message made its way back to them years later. Students find the letters extremely special and important, especially in today’s world where psychical messages have become so rare.