I’m a big fan of concealing doll heads behind drywall. The local hobby shop used to sell half-heads (just the face and neck, including eyes), so that was my go-to.
It was also a hard to fix drywall job, so it looks a little janky. It’s almost guaranteed that the next owner rips out that section and finds her.
This is a really nice idea. Which is refreshing, because my go-to is always something mildly disturbing but not too scary or criminal.
If I were going the wholesome route, I’d add a paper note to the USB or other digital storage, though. If I were to find a LaserDisc from 1990, that would be more or less unreadable without expending some significant effort.
But maybe future folk will have magical devices that can read cassettes, 8-tracks, or whatever.