Amidst the busy days of school and work, Garth Callaghan wanted to find a way to make sure his young daughter, Emma, knew she was still on his mind. So, starting when she was in 2nd grade, he began including a note with her lunch.

Fast-forward to today, 3 cancer diagnoses later.

In light of his illness, and with no knowledge of how much time he has left, Callaghan has taken what he started so long ago and turned it into a part of his legacy to his daughter.

He has pledged to write 826 napkin notes so that she has a piece of him every day through graduation, even if he’s not there with her.