That's a good idea, I have a terrible memory. I recently posted about keeping a Journal on razor honing, you know, what I did to what blade, what worked, and what didn't simply because I don't remember. You want paper and pen that will stand the test of time. At first I thought maybe putting it into the computer and backing up it to disk, but that's impersonal.
A handwritten journal would be much more valuable to your children, I'm sure. Thanks for sharing you idea...
Rich