I suggest you back up the HTML files as a record of her work when she was still a child, it will be a family treasure in the future :) You can even add it under your family's domain for safekeeping.
I started when I was 9, using Word as the editor. This was 5 years later and I was 14 at the time), I both wish and am ok with the content no longer being there. At least I can go back humor myself on what I put in the side-navigation.
I removed a lot of my older content from the Wayback Machine out of paranoia that future employers might find it and judge current me based off that. Pretty silly in hindsight.
I do still have code archived by Planet Source Code though.
