I'm doing everything I can to make sure that they will be able to see what their life was like growing up.
I literally feel like an archivist at times. I go through a lot of trouble to document and preserve their life so they have something to look back on.
1) Photos and videos ... I have a local and cloud copy of them all [1].
2) Notes I send via email to addresses currently hosted on GMail but at an email address at my domain (looking for a better solution in terms of ownership on this)