Pluggable picture frame.

It's a quick doodle of a multipart picture frame. You can plug pieces of frame onto the base to extend it, and to hold down the picture within.

I would probably make it (more) parametric and extendable in all dimensions, but I'll leave it WIP until I actually get around to it.
Yes, I am aware that I could just print a round Tuit myself. Thank you Thingiverse.

Public domain.