I have been writing a journal addressed to my son. It is just a markdown file. But this system has a flaw that is I go back and edit old entries.

I would never trust a 3rd party for this kind of project. But I like that you cannot edit your emails. It just feels more honest.

Now I am thinking of sending him hand written letters by mail. And just save them until he is old enough. I can add photos or his other favorite things in the letters. It would be a lot more fun to open these letters in the future instead of reading a text file.