Raspberry pi 3+ projects

I used openwrt for a degree project. Degree finally finished so I have some time to spare.
project went well and I received a good mark overall, have a number of raspberry pi 3+ Boards which I have installed openwrt on,

Looking for any interesting project to take on over Christmas as I have a few weeks off.
Set them up as Access Points and now looking for something more interesting, like streaming video or settings up a mesh.

If anyone has anything interesting and a wiki page of how it implemented that would be fine, don’t mind spending a few pounds on accessories if needed.
I know raspberry itself has numerous project, but I would like to develop my skills on the openwrt platform.

Cheers thanks,